%0 Journal Article %A S. N. Volkov %T Optimal investment with operating costs proportional to the capital portfolio %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1996 %P 1227-1228 %V 51 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1996_51_6_a21/ %G en %F RM_1996_51_6_a21