%0 Journal Article
%A V. V. Filippov
%T On the acyclicity of solution sets of ordinary differential
%J Doklady Akademii Nauk
%D 1997
%P 28-31
%V 352
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1997_352_1_a6/
%G ru
%F DAN_1997_352_1_a6