Vida, Adrienn, and Anna Dunay. “Economic Analysis of an Energetically Self-Supporting Farm – Possibilities of Biogas Production in Particular”. Animal welfare, Ethology and Housing Systems (AWETH) 10, no. 1 (June 30, 2014): 32–38. Accessed December 5, 2025. https://journal.uni-mate.hu/index.php/aweth/article/view/6696.