%0 Journal Article %A Chleboun, Jan %T Hybrid variational formulation of an elliptic state equation applied to an optimal shape problem %J Kybernetika %D 1993 %P 231-248 %V 29 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/KYB_1993__29_3_a3/ %G en %F KYB_1993__29_3_a3