TY - JOUR AU - Doležal, Jaroslav TI - Existence of optimal solutions in general discrete systems JO - Kybernetika PY - 1975 SP - EP - 312 VL - 11 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/KYB_1975__11_4_a4/ LA - en ID - KYB_1975__11_4_a4 ER -