Lybæk, Rikke, and Tyge Kjær. “Municipalities As Facilitators, Regulators and Energy Consumers for Enhancing the Dissemination of Biogas Technology in Denmark”. International Journal of Sustainable Energy Planning and Management 8 (December 29, 2015): 17–30. Accessed May 4, 2024. https://journals.aau.dk/index.php/sepm/article/view/1137.