Kosiński, Eryk, and Anna Mikulska. “Assessing the Rules of Functioning and Organization of the Wholesale Natural Gas Market in the European Union and Ukraine: Legal and Socio-Political Perspective: Part 2: Regulatory Issues and Requirements ”. PRAWO i WIĘŹ, no. 35 (March 27, 2021): 112–127. Accessed June 7, 2025. https://www.prawoiwiez.edu.pl/index.php/piw/article/view/268.