%0 Journal Article
%A I. I. Pleshkan
%T Questions of the isochronism of systems with discontinuous right hand sides
%J Differencialʹnye uravneniâ
%D 1974
%P 822-837
%V 10
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1974_10_5_a7/
%G ru
%F DE_1974_10_5_a7