%0 Journal Article %A Kučera, Vladimír %T Special issue: System Structure and Control. I %J Kybernetika %D 1991 %V 27 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/KYB_1991__27_3_a0/ %G en %F KYB_1991__27_3_a0