%0 Journal Article
%A V. V. Filippov
%T Sequences of changes of variables and the Liénard equation
%J Differencialʹnye uravneniâ
%D 1994
%P 1148-1155
%V 30
%N 7
%U http://geodesic.mathdoc.fr/item/DE_1994_30_7_a6/
%G ru
%F DE_1994_30_7_a6