PODESZWA, Ewelina; BIERNAT, Krzysztof. Biogas as an alternative energy source. Studia Ecologiae et Bioethicae, [S. l.], v. 12, n. 2, p. 135–154, 2014. DOI: 10.21697/seb.2014.12.2.08. Disponível em: https://czasopisma.uksw.edu.pl/index.php/seb/article/view/3316. Acesso em: 6 dec. 2025.