Askeland, Kristine, Bente Johnsen Rygg, and Karl Sperling. “The Role of 4th Generation District Heating (4GDH) in a Highly Electrified Hydropower Dominated Energy System: The Case of Norway”. International Journal of Sustainable Energy Planning and Management 27 (March 10, 2020): 17–34. Accessed April 20, 2024. https://journals.aau.dk/index.php/sepm/article/view/3683.