4Nils Flatab,Gerard Doorman, Ove S.Grande,Hans Randen, Ivar Wangensteen.Experience with the Nord Pool Design and Implementation.IEEE Trans.on Power Systems,2003,18(2): 541- 547
5Tarjei Kristiansen.Congestion management, transmission pricing and area price hedging in the Nordic region.Electrical Power and Energy Systems,2004,26(9):685 - 695