“CREATING OF SUSTAINABLE RURAL AREAS DEVELOPMENT BASED ON THE AGRICULTURAL BIOGAS PLANTS”, zeszyty, vol. 1, no. 18, pp. 11–23, Jan. 2021, Accessed: Jul. 20, 2025. [Online]. Available: https://ezeszyty.wne.tu.koszalin.pl/index.php/zeszyty/article/view/176