Prof. dr Grzegorz Materna is a recognized and leading competition law practitioner, who headed the Polish Competition Authority’s Department of Competition Protection for six years before joining Hansberry Tomkiel. He is a solicitor and a member of the Warsaw Chamber of Legal Advisors, as well as an Associate Professor of the Institute of Law Studies of the Polish Academy of Sciences (INP PAN).

Mr Materna has invaluable knowledge and experience resulting from his direct involvement in carrying out investigatory proceedings at all levels and drafting decisions on behalf of the Chairman of the Competition Authority. Mr Materna oversaw investigations and proceedings in matters of horizontal and vertical anticompetitive agreements, cartels and abuses of dominance. He organized and participated in inspections and searches carried out by the Authority and represented it in cases before the Competition and Consumer Protection Court as well as the Court of Appeals.

Since joining Hansberry Tomkiel, Mr Materna has showed himself to be a superb practitioner, who is trusted and appreciated by clients of the Firm. He possesses the unusual capability of combining his vast knowledge and experience in EU and Polish competition law with creative and successful approaches to the cases of our clients. Mr Materna has represented clients in proceedings before the: Polish Competition Authority; Electronic Communication Authority, Polish Courts and EU Court of Justice. His private practice experience also covers assistance during the Competition Authority’s “dawn-raids”.

Mr Materna combines his practice of competition law with a passion for legal science. He wrote or collaborated on over one hundred publications on Polish and European competition and consumer protection law, including commentaries to the Polish Competition and Consumer Protection Act and the Treaty on the Functioning of the European Union. Since 2006, Mr Materna has been associated with INP PAN, where he defended his PhD thesis and habilitation on competition law. Since 2016, he has headed the Institute’s Department of Competition Law. As an experienced lecturer and renowned expert, he leads the postgraduate competition law and consumer protection law programs organized by INP PAN.

• • „Promoting the implementation of compliance programs as part of the public enforcement of EU competition law” (co-authored with A. Szmigielski), Europejski Przegląd Sądowy No 2/2020, p. 17-26
  • “La risposta dell’autorità polacca per la concorrenza alle pratiche sleali COVID-19” // “Polish Competition Authority’s response to unfair conduct related to Covid-19 outbreak”, Osservatorio Permanente sull’Applicazione delle Regole di Concorrenza Newsletter n. 13/20 del 1° aprile 2020
  • “Vendita di stampanti in Polonia: decisione nei confronti della Brother Central & Eastern Europe GmbH per aver importo prezzi minimi di rivendita ai rivenditori online // Sales of printers in Poland: Polish Competition Authority decision against Brother Central & Eastern Europe GmbH for imposing minimum resale prices on online retailers”, Osservatorio Permanente sull’Applicazione delle Regole di Concorrenza Newsletter n. 6/20 del 13 febbraio 2020
  • „Individuazione di pratiche restrittive in Polonia: L’autorità polacca per la concorrenza migliora il suo programma per i whistle-blowers // Detection of restrictive practices in Poland: Polish Competition Authority enhances its program for whistle-blowers”, Osservatorio Permanente sull’Applicazione delle Regole di Concorrenza Newsletter n. 1/20 dell’8 gennaio 2020
  • „L’autorità polacca per la concorrenza ha aperto un procedimento contro ‘Allegro’, una piattaforma di shopping online// The Polish Competition Authority opened antimonopoly proceedings against ‘Allegro’, an online shopping platform”, Osservatorio Permanente sull’Applicazione delle Regole di Concorrenza Newsletter n. 1/20 dell’8 gennaio 2020
  • „Editorial foreword”, Yearbook of Antitrust and Regulatory Studies No 12(20)/2019, p. 5-7 (co-authored with A. Piszcz)
  • „The introduction of the compliance programme as a mitigating circumstance in the light of the guidelines of the Italian competition authority (Autorita’ Garante della Concorrenza e del Mercato)”, internetowy Kwartalnik Antymonopolowy i Regulacyjny No 6/2019, p. 92-106
  • „Cartels – the law and practice in Poland” (in:) “Chambers Global Practice Guide. Cartels 2019”, (co-authored with D. Hansberry-Bieguńska, M. Krasnodębska-Tomkiel, D. Podsiedzik-Malec), p. 247-257, ISBN: 978-0-85514-787-7
  • „Guarantees of the independence of the national competition authority in the light of Directive ECN+ and the Polish competition authority”, Europejski Przegląd Sądowy No 10/2019, p. 19-26
  • “VII Convegno Antitrust di Trento, 11-13 April 2019” (conference report), internetowy Kwartalnik Antymonopolowy i Regulacyjny No 4/2019, p. 142-144
  • „The Polish President of the Office of Competition and Consumer Protection imposes sanctions on two undertakings for colluding in public-institution tenders for the supply of bread (Natex / Dziewit)”, 30 December 2015, e-Competitions Bulletin December 2015, Art. N° 92106 (added to the Bulletin: Nov. 2019)
  • „Costruzione del gasdotto Nord Stream 2: L’autorità polacca ha inflitto un’ammenda di 172 milioni di PLN (circa 40 milioni di euro) a Energy Management Holding Switzerland per non aver fornito informazioni nell’ambito di un procedimento per una presunta violazione delle norme polacche in materia di concentrazioni // Construction of the Nord Stream 2 gas pipeline: UOKiK imposed 172 mln PLN (approximately 40 mln EUR) fine to Energy Management Holding Switzerland for failing to provide information within a proceedings concerning alleged violation of the Polish merger rules”, Osservatorio Permanente sull’Applicazione delle Regole di Concorrenza Newsletter n. 37/19 del 13 Novembre 2019
  • „Servizi postali in Polonia: L’Autorità di concorrenza polacca accerta l’intesa tra due partecipanti ad una gara d’appalto per la fornitura di servizi postali e di consegna di pacchi tramite corriere” // “Postal services in Poland: The Polish Competition Authority issued a decision finding that two bidders colluded in a tender organized by “Poczta Polska” (the Polish postal operator) for subcontractors to provide the delivery of postal and courier parcel services”, Osservatorio Permanente sull’Applicazione delle Regole di Concorrenza Newsletter n. 32/19 del 9 ottobre 2019
  • „Vendite di prodotti dietetici in Polonia: l’Autorità polacca garante della concorrenza apre un procedimento antimonopolio contro il distributore polacco di vitamine, erbe e integratori e contro due dirigenti di tale società per presunto accordo RPM” // “Sales of dietary supplements in Poland: Polish Competition Authority opens antimonopoly proceedings against the Polish distributor of vitamins, herbs and supplements, and against two managers of that company for alleged RPM agreement”, Osservatorio Permanente sull’Applicazione delle Regole di Concorrenza Newsletter n. 20/19 del 22 maggio 2019
  • „Distribuzione di camion in Polonia: avviato un procedimento nei confronti dei rivenditori DAF e di nove dirigenti per una presunta ripartizione del mercato”// “Distribution of trucks in Poland: investigation opened against dealers of DAF trucks and 9 managers for alleged market sharing”, Osservatorio Permanente sull’Applicazione delle Regole di Concorrenza Newsletter n. 16/19 del 17 aprile 2019
  • “The introduction of the compliance programme as a mitigating circumstance in the light of the guidelines of the Italian competition authority (Autorita’ Garante della Concorrenza e del Mercato)”, internetowy Kwartalnik Antymonopolowy i Regulacyjny No 6/2019
  • “Guarantees of the independence of the national competition authority in the light of Directive ECN+ and the Polish competition authority”, Europejski Przegląd Sądowy No 10/2019
  • “VII Convegno Antitrust di Trento, Trydent, 11-13 April 2019 roku” (sprawozdanie z konferencji), internetowy Kwartalnik Antymonopolowy i Regulacyjny No 4/2019
  • „Cartels – the law and practice in Poland” (in:) “Chambers Global Practice Guide. Cartels 2019”, (co-authored with z D. Hansberry-Bieguńska, M. Krasnodębska-Tomkiel, D. Podsiedzik-Malec), ISBN: 978-0-85514-787-7
  • “Postal services in Poland: The Polish Competition Authority issued a decision finding that two bidders colluded in a tender organized by “Poczta Polska” (the Polish postal operator) for subcontractors to provide the delivery of postal and courier parcel services” // „Servizi postali in Polonia: L’Autorità di concorrenza polacca accerta l’intesa tra due partecipanti ad una gara d’appalto per la fornitura di servizi postali e di consegna di pacchi tramite corriere”, Osservatorio Permanente sull’Applicazione delle Regole di Concorrenza Newsletter n. 32/19 del 9 ottobre 2019
  • “Sales of dietary supplements in Poland: Polish Competition Authority opens antimonopoly proceedings against the Polish distributor of vitamins, herbs and supplements, and against two managers of that company for alleged RPM agreement” // „Vendite di prodotti dietetici in Polonia: l’Autorità polacca garante della concorrenza apre un procedimento antimonopolio contro il distributore polacco di vitamine, erbe e integratori e contro due dirigenti di tale società per presunto accordo RPM”, Osservatorio Permanente sull’Applicazione delle Regole di Concorrenza Newsletter n. 20/19 del 22 maggio 2019
  • “Distribution of trucks in Poland: investigation opened against dealers of DAF trucks and 9 managers for alleged market sharing” // „Distribuzione di camion in Polonia: avviato un procedimento nei confronti dei rivenditori DAF e di nove dirigenti per una presunta ripartizione del mercato”, Osservatorio Permanente sull’Applicazione delle Regole di Concorrenza Newsletter n. 16/19 del 17 aprile 2019
  • Non-compete clauses as a barrier to the development of alternative taxi reservation channels in the light of the decision of the Autorità Garante della Concorrenza e del Mercato of 27 June 2018 (case I801B, Taxi – Milano), internetowy Kwartalnik Antymonopolowy i Regulacyjny No 8/2018
  • New technologies, Big Data and the digital economy: current challenges for competition law (from the Volume Editor), internetowy Kwartalnik Antymonopolowy i Regulacyjny No 8/2018
  • Report on the XIII Antitrust Conference ‘Antitrust between EU Law and National Law’, Treviso (Italy), 24-25.05.2018, internetowy Kwartalnik Antymonopolowy i Regulacyjny No 8/2018
  • Limiting the possibility of the President of the anti-monopoly office to change the scope of case analysis after the initiation of the relevant administrative [investigatory] proceedings, Glosa No 4/2018
  • Limiting the admissibility of financial penalties imposed by the President of UOKiK as a result of a re-evaluation of undertakings’ conduct – against the background of the guarantees of protection against double jeopardy, Glosa No 2/2018
  • Draft ECN+ Directive – discussion concerning the need for another amendment of Polish competition law, internetowy Kwartalnik Antymonopolowy i Regulacyjny No 2/2018
  • A voice concerting the rationalizing of conditional clearance in concentration cases (about a possibility of change of conditional clearance decisions in merger cases), Report from the seminar organized by Instytut Nauk Prawnych PAN, Warszawa, 30 maja 2017 r., internetowy Kwartalnik Antymonopolowy i Regulacyjny No 5/2017 (co-authored with dr J. Łukawski)
  • Obligations of undertakings during the inspection by the President of the Office for Competition and Consumer Protection – commentary on the Court of Appeal’s judgement of 22.11.2016, VI ACa 1141/15, Glosa No 4/2017
  • Public compensation – a new means of effective elimination of adverse market practices by the President of OCCP [in:] M. Bernatt, A. Jurkowska-Gomułka, M. Namysłowska, A. Piszcz (ed.) “Challenges for competition protection and market regulation. A jubilee book dedicated to Professor Tadeusz Skoczny, C.H.Beck, Warszawa 2017
  • Internet: a special area of companies’ rivalry and a special challenge for competition protection law from the perspective of the prohibition of anti-competitive agreements (in:) T. Targosz, P. Kostański, P. Podrecki (ed.) Experientiadocet. The jubilee book dedicated to Professor ElżbietaTraple, Wolters Kluwer, Warsaw 2017
  • The Polish Competition Authority approves the acquisition of control by the leading Polish insurance company of a direct competitor (Powszechny Zakład Ubezpieczeń), Bulletin e-Competitions, June 2017 – 2, No. 84330
  • Vertical price agreements – evolution of decisions of the courts and of the President of UOKiK, Glosa 2/2017
  • The perspectives of the protection by the antitrust authority against the abuse of the in-house exemption (using the example of maintenance and cleaning services in municipalities), Przegląd Ustawodawstwa Gospodarczego 4/2017 (co-authored with M. Krasnodębska-Tomkiel)
  • The Polish Competition Authority fines a professional association for anticompetitive conduct aimed at governmental treatment of an infertility programme (Association of Medical Centers), Bulletin e-Competitions, http://www.concurrences.com/Bulletin, November 2016, No. 81975
  • Leniency programmes in Polish and US antitrust law and access to leniency materials in private damage actions in cases of cartels and other restrictive agreements, internetowy Kwartalnik Antymonopolowy i Regulacyjny 5/2016(co-authored with M. Krasnodębska-Tomkiel and D. Hansberry-Bieguńska)
  • Bid-rigging in light of competition and penal law, Wolters Kluwer, Warszawa 2016
  • Antitrust proceedings in investigations of competition-restricting practices in Poland [in:] C.I. Nagy (ed.) The procedural aspects of the application of competition law: European frameworks – Central European perspectives, wydawnictwo Europa Law Publishing, Groningen 2016(co-authored with K. Kowalik-Bańczyk and M. Krasnodębska-Tomkiel)
  • Activity of a booking platform administrator and a concerted practice of the companies using the platform – the commentary on the Court of Justice judgement in Case C-74/14 “Eturas” UAB and Others v Lietuvos Respublikos konkurencijos taryba, Przegląd Ustawodawstwa Gospodarczego 6/2016
  • The Polish Competition Authority imposes sanctions for retail price maintenance in the wristwatch distribution sector while announcing a new economic-based approach to vertical agreements (Swatch), e-Competitions Antitrust Case Law Bulletin, January 2016, Art. N° 77426
  • Conditions for the initiation of inspections or searches in antitrust cases conducted under the Competition Act and the requirements of Article 8 of the European Charter of Human Rights, iKAR, 8(4)/2015
  • The Polish Competition Authority accepts commitments concerning online sales of prams and strollers (Emmaljunga), e-Competitions Antitrust Case Law Bulletin, November 2015-II, Art. No 76793
  • Competition restriction as a factor limiting the application of Article 6 par. 1 point 7 Competition Act to agreements affecting the course of the tender procedure [in] T. Skoczny (ed.) Competition Law. 25 Years, Warsaw 2015
  • The impact of competition law on competitiveness and innovation of entrepreneurs as exemplified in the rules defining the limits of cooperation among competitors [in] A. Brzezińska-Rawa, D. Sylwestrzak (ed.) Key issues of state impact on competitiveness and innovativeness of the economy from the perspective of different fields of law, Toruń 2015
  • Standard of proof of anticompetitive agreement between undertakings – commentary on the Supreme Court decision of 28 January 2015 r. (III SK 39/14), Glosa – Prawo Gospodarcze w Orzeczeniach i Komentarzach, 4/2015
  • Agreements in tender procedure – limitations and forms of cooperation in the light of the latest practice of antitrust law, Przegląd Ustawodawstwa Gospodarczego, 10/2015
  • Exercise by the European Commission of control powers in cases from the field of competition protection – Case Law Review. Europejski Przegląd Sądowy, 7/2015.
  • Application of prohibition of competition restricting agreements to collective labour agreements – commentary on Court of Justice Judgment of 4 December 2014 in Case C-413/13 FNV Kunsten en Media versus Staat der Nederlanden. Europejski Przegląd Sądowy, 4/2015.
  • Changes in substantive and procedural provisions on practices restricting competition and practices infringing collective consumer interests (co-authored with A. Zawłocka-Turno). IKAR, 2(4)/2015.
  • Forms of Collusive Tendering and Instruments to Combat them under Antitrust Law – Difficulties in Detecting Illegal Agreements [in] The Role of Public Administration Authorities in Detecting Irregularities in Public Procurement. IV International Anti-Corruption Conference. Post-conference materials, Warsaw 2014.
  • Commentary on Art. 4.1-2, Art. 105b-105d, Art. 105g-105h, Art. 105j, Art. 105l-105m and Art. 105o-105p [in] T. Skoczny (ed.) – The Competition and Consumer Protection Act. Commentary, 2nd ed., Warsaw 2014.
  • Commentary on Art. 105a (co-authored with M. Bernatt) [in] T. Skoczny (ed.) – The Competition and Consumer Protection Act. Commentary, 2nd ed., Warsaw 2014.
  • Resolutions and other acts of associations of undertakings as a source of restriction of competition in public procurement procedures. Przegląd Ustawodawstwa Gospodarczego, 7/2014.
  • Associations of undertakings’ laying down criteria for determining fees for services provided by its members in the light of the prohibition specified in Art. 101(1) TFEU – commentary on the CoJ Judgment of 18 July 2013 in case C-136/12, Consiglio Nazionale dei geology vs. Autorità garante della concorrenza e del mercato and Autorità garante della concorrenza e del mercato versus Consiglio nazionale dei geologi. Europejski Przegląd Sądowy, 5/2014.
  • The subjective scope of prohibition of bid-rigging in Polish law on competition’s protection and in criminal law. Przegląd Ustawodawstwa Gospodarczego, 12/2013.
  • Application of the prohibition of anticompetitive agreements to agency agreements under block exemption regulation of 30 March 2011. IKAR, 5(2)/2013.
  • Protection of market against competitor operating unlawfully as grounds for assessment of an agreement in the light of Art. 101 TFEU – commentary on CoJ Judgment of 07 February 2013 in case C-68/12 – Protimonopolný úrad Slovenskej republiky versus Slovenská spořiteľňa a.s. Europejski Przegląd Sądowy, 9/2013.
  • Competition from the perspective of Antitrust law [in] J. Cygler, M. Aluchna, E. Marciszewska, M.K. Witek-Hajduk, G. Materna: Enterprise Coopetition in the Era of Globalization. Strategic Challenges, Legal Contingencies. Wolters Kluwer Publishers, Warsaw 2013.
  • The antitrust assessment of the amount of royalties rates for using of copyrighted works or objects of related rights in light of the amended Copyright Law. Przegląd Ustawodawstwa Gospodarczego, 4/2013.
  • Frequency of infringements of the Act on Competition and Consumer Protection and its importance for the imposition of fines – commentary on Supreme Court Judgment of 11 August 2009 (III SK 17/09). Glosa – Prawo Gospodarcze w Orzeczeniach i Komentarzach, 1/2013.
  • The absence of Antitrust Law does not mean consent to collusion. Dziennik Gazeta Prawna, 04.17.2013.
  • Collection of evidence in antitrust investigations – Where the powers of the OCCP President end [in] A. Brzezińska-Rawa, H. Nowicki (ed.) – The state and the economy. Toruń 2012.
  • Judicial supervision on control (search) execution in entrepreneur’s seat during the proceedings before the President of Competition and Consumer Protection. Przegląd Ustawodawstwa Gospodarczego, 7/2012.

• Conducting antimonopoly proceedings in the cases of distribution agreements solely against organisers of distribution systems. Przegląd Prawa Handlowego, 5/2012.

• Commentary on Art. 101 (1) of the Treaty on the Functioning of the European Union [in] A. Wróbel, K. Kowalik-Bańczyk, M. Szwarc-Kucher (ed.): The Treaty on the Functioning of the European Union. Commentary, vol. II, Wolters Kluwer Publishers, Warsaw 2012.
• Limits of application of the rules on the abuse of dominant position to the organisational activities of local government units – review of Supreme Court case law. Glosa 2/2012.
• Competitors are not allowed to agree on production volumes. Dziennik Gazeta Prawna, 10.10.2012.
• The OCCP is allowed to access confidential information of a suspected enterprise. Dziennik Gazeta Prawna, 11.07.2012.
• It is worth confessing and cooperating early with the OCCP. Dziennik Gazeta Prawna, 6.06.2012.
• When investigating collusion, the OCCP will check suspected entrepreneurs. Dziennik Gazeta Prawna, 18.04.2012.
• Precedent violations of the Competition Act’s provisions versus fines awarded by the President of Competition and Consumer Protection Office (UOKiK). Przegląd Ustawodawstwa Gospodarczego, 11/2011.
• Legal aspects of brand management [in] M.K. Witek-Hajduk (ed.): Managing a strong brand. Wolters Kluwer Publishers, Warsaw 2011.
• Pricing for wholesale wastewater collection as restrictive practices under the Act on Competition and Consumer Protection – gloss to the sentence of the Supreme Court of February 12 2009 (III SK 29/08). Glosa 4/2010.
• A note on the Judgment of the Court of First Instance of 26 January 2005 in Case T-193/02 Laurent Piau vs. Commission of the European Communities [in] A. Jurkowska-Gomułka (ed.): Case law of the Community Courts in competition matters 2004-2009, Wolters Kluwer Publishers, Warsaw 2010.
• A note on the Supreme Court Judgment of 02.04.2009 (Case III SK 19/08). Lex 2010.
• A note on the ECJ Judgment of 23 April 2009 (Case C-425/07 P). Lex 2010.
• Collective management of rights – the role of the Competition Authority against the background of copyright law [in] M. Krasnodębska-Tomkiel (ed.): Changes in Competition Policy Over the Last Two Decades. Published in connection with the 20th Anniversary of the Office of Competition and Consumer Protection. OCCP, Warsaw 2010.
• The application of antitrust law to collective management organizations – the limits of interference by the Antitrust Authority. Glosa 2/2010.
• The impact of EU law on Polish block exemptions from the prohibition of anticompetitive agreements. Europejski Przegląd Sądowy, 5/2010.
• Status of public and private universities in matters of abstractive control of pattern contracts. Przegląd Ustawodawstwa Gospodarczego, 3/2010.
• The application of antitrust law to collective management organizations – the boundaries of interference by the antitrust authority [in] K. Lewandowski (ed.): Copyright Law vs. Antitrust Law. Proceedings of the National Scientific Conference held in Poznań on 3rd June 2009, Poznań 2009.
• Sports association as an undertaking under Art. 82 and Art. 86 TEC – commentary to ECJ Judgement of 1 July 2008 in case C-49/07 Motosykletistiki Omospondia Ellados NPID (MOTOE). Europejski Przegląd Sądowy, 12/2009.
• The concept of “entrepreneur” in Polish and European competition law, Wolters Kluwer Publishers, Warsaw 2009.
• Organizing public services in antitrust law – a note on the Supreme Court Judgment of 20.11.2008 (Case III SK 12/08). Glosa 3/2009.
• Entities which are subjects of Polish and EC law prohibitions of anti-competitive practices. Europejski Przegląd Sądowy, 6/2009.
• Commentary on Art. 4.1 and 4.2 of the Competition and Consumer Protection Act of 16.02.2007 (Journal of Laws No. 50, item. 331) [in] T. Skoczny, A. Jurkowska, D. Miąsik (ed.): The Competition and Consumer Protection Act, Commentary. Warsaw 2009.
• The status of organizations of collective copyright management in competition law – a note on the Supreme Court Judgment of 6.12.2007 (Case III SK 16/07). Glosa 1/2009.
• Limiting the right to inspect evidence in proceedings before the President of the Office of Competition and Consumer Protection [UOKiK]. Przegląd Prawa Handlowego, 4/2008.
• Factors affecting fines imposed on a local self-government unit for anticompetitive practices. Glosa 1/2008.
• Collective management organizations are treated as entrepreneurs. Rzeczpospolita, 27.10.2008.
• Commission’s method of setting fines for the infringement of Art. 81 and 82 TEC. Europejski Przegląd Sądowy, 7/2007.
• Pluralism of the organizations for collective management of copyrights and related rights in European Competition law [in] W. Czapliński (ed.): Law in the 21st Century. Book commemorating the 50th Anniversary of the Polish Academy of Sciences Institute of Law Studies, Warsaw 2006.
• Anticompetitive practices of organizations for collective management of copyrights – case law review 2002-2006. Glosa, 4/2006.
• The definition of “Entrepreneur” and the relationship between Community and Polish competition laws [in] C. Banasinski, M. Kępiński, B. Popowska, T. Rabska (ed.): Current issues in Polish and European Competition laws, Warsaw 2006.
• Protection of competition and funeral services. Rzeczpospolita, 11.04.2006.
• The liability of publicly-funded communal enterprises for engaging in anticompetitive conduct in light of the antitrust case law. Samorząd Terytorialny, 7-8/2005.
• Protection of competition in the enlarged European Union. Gospodarka Materiałowa i Logistyka, 7/2005.
• Public institutions of health insurance in the light of antimonopoly law. Państwo i Prawo, 6/2005.
• Anticompetitive contractual provisions in corporate merger transactions – Community and Polish case law. Glosa, 2/2005.
• Small businesses and municipal monopolies. How to fight abuses of dominance. Rzeczpospolita, 20.09.2005
• New Community rules on group exemptions of technology transfer Contracts from the prohibition of anticompetitive agreements. Przegląd Prawa Handlowego, 6/2004.
• Organizations for the collective management of copyrights and their members in light of the definition of “Entrepreneur” in the Competition and Consumer Protection Act. Przegląd Ustawodawstwa Gospodarczego, 4/2004.
• Abuse of dominance by organizations for the collective management of copyrights in community law. Przegląd Prawa Handlowego, 11/2003
• The Competition and Consumer Protection Act and the exercise of copyrights. Kwartalnik Prawa Publicznego, 4/2002.