Sorknæs, Peter, Henrik Lund, Anders N Andersen, and Peter Ritter. “Small-Scale Combined Heat and Power As a Balancing Reserve for Wind – The Case of Participation in the German Secondary Control Reserve”. International Journal of Sustainable Energy Planning and Management 4 (February 27, 2015): 31–42. Accessed November 21, 2024. https://journals.aau.dk/index.php/sepm/article/view/927.