%0 Journal Article %A Doležal, Jaroslav %T Necessary conditions for discrete dynamical systems with delays and general constraints %J Kybernetika %D 1981 %P 425-434 %V 17 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/KYB_1981__17_5_a7/ %G en %F KYB_1981__17_5_a7