Kosiński, Eryk, and Anna Mikulska. 2021. “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): 112-27. https://doi.org/10.36128/priw.vi35.194.