TY - JOUR AU - Kučera, Vladimír TI - Special issue: System Structure and Control. I JO - Kybernetika PY - 1991 SP - 169 VL - 27 IS - 3 UR - http://geodesic.mathdoc.fr/item/KYB_1991_27_3_a0/ LA - en ID - KYB_1991_27_3_a0 ER -