%0 Journal Article %A Zagalak, Petr %A Kučera, Vladimír %T Fundamental theorem of proportional state feedback for descriptor systems %J Kybernetika %D 1992 %P 81-89 %V 28 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/KYB_1992__28_2_a0/ %G en %F KYB_1992__28_2_a0