%0 Journal Article %A Kučera, Vladimír %T Special issue: System Structure and Control. I %J Kybernetika %D 1991 %P 169 %V 27 %N 3 %U http://geodesic.mathdoc.fr/item/KYB_1991_27_3_a0/ %G en %F KYB_1991_27_3_a0