%0 Journal Article %A Hájek, Miloslav %T The characteristic polynomial of the feedback connection of dynamical systems %J Kybernetika %D 1971 %P 48-57 %V 7 %N 1 %U http://geodesic.mathdoc.fr/item/KYB_1971_7_1_a4/ %G en %F KYB_1971_7_1_a4