@misc{EichhornGroeweKuskaLiebscheretal.2005, author = {Andreas Eichhorn and Nicole Gr{\"o}we-Kuska and Andrea Liebscher and Werner R{\"o}misch and Isabel Wegner}, title = {Mean-risk optimization of electricity portfolios}, institution = {Humboldt-Universit{\"a}t zu Berlin}, type = {preprintmatheon}, year = {2005}, }