%0 Journal Article
%A A. F. Filippov
%T Stability and instability by the first approximation
%J Differencialʹnye uravneniâ
%D 2000
%P 475-485
%V 36
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_2000_36_4_a7/
%G ru
%F DE_2000_36_4_a7