Szterlik, Paulina. “The Development of Biogas Production in the Context of Energy Transition: The Case of Poland”. Public Governance / Zarządzanie Publiczne 57, no. 3 (December 28, 2021): 55-68. Accessed August 14, 2022. https://zarzadzaniepubliczne.pl/index.php/zpub/article/view/590.