Østergaard, Poul Alberg, Rasmus Magni Johannsen, and Neven Duic. “Sustainable Development Using Renewable Energy Systems”. International Journal of Sustainable Energy Planning and Management 29 (September 25, 2020): 1–6. Accessed November 21, 2024. https://journals.aau.dk/index.php/sepm/article/view/4302.