Alnæs, E. N., R. B. Grøndahl, S.-E. Fleten, and T. K. Boomsma. “Insights from Actual Day-Ahead Bidding of Hydropower”. International Journal of Sustainable Energy Planning and Management, vol. 7, Nov. 2015, pp. 34-54, doi:10.5278/ijsepm.2015.7.4.