Trømborg, E., M. Havskjold, T. F. Bolkesjø, J. G. Kirkerud, and Åsa G. Tveten. “Flexible Use of Electricity in Heat-Only District Heating Plants”. International Journal of Sustainable Energy Planning and Management, vol. 12, Mar. 2017, pp. 29-46, doi:10.5278/ijsepm.2017.12.4.