%0 Journal Article %A A. O. Ignatyev %T On the existence of a periodic solution of the Lienard system with impulse effect %J Trudy Instituta matematiki i mehaniki %D 2021 %P 79-87 %V 27 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TIMM_2021_27_1_a7/ %G ru %F TIMM_2021_27_1_a7