Schmutz, A.Gnansounou, E.Sarlos, G.2007-04-262007-04-262007-04-26200210.1109/TPWRS.2002.804920https://infoscience.epfl.ch/handle/20.500.14299/6244WOS:0001799858000063515Economic performance of contracts in electricity markets : A fuzzy and multiple criteria approachtext::journal::journal article::research article