PIWOWAR, A. Development of the Agricultural Biogas Market in Poland – Production Volume, Feedstocks, Activities and Behaviours of Farmers. Zeszyty Naukowe SGGW w Warszawie - Problemy Rolnictwa Światowego, [S. l.], v. 19, n. 1, p. 88–97, 2019. DOI: 10.22630/PRS.2019.19.1.8. Disponível em: https://prs.sggw.edu.pl/article/view/2668. Acesso em: 24 lis. 2024.