%0 Journal Article %A Yu. A. Dmitriev %T Frequency conditions for dissipation and existence of periodic solutions in the case of pulse systems with one non-linear block %J Doklady Akademii Nauk %D 1965 %P 28-31 %V 164 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1965_164_1_a5/ %G ru %F DAN_1965_164_1_a5