Niekurzak , Mariusz, and Ewa Kubińska-Jabcoń. “The Use of Biogas As a Biofuel for Powering Biogas, Ecology, Renewable Energy Sources”. AUTOBUSY – Technika, Eksploatacja, Systemy Transportowe 24, no. 6 (June 30, 2019): 218–222. Accessed March 1, 2024. https://journals.economic-research.pl/atest/article/view/1679.