%0 Journal Article
%A M. M. Khapaev
%T Singular differential equations in control problems with
%J Doklady Akademii Nauk
%D 1992
%P 1166-1168
%V 324
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1992_324_6_a5/
%G ru
%F DAN_1992_324_6_a5