%0 Journal Article
%A E. E. Barbashina
%T On the theory of necessary second order optimality conditions.~I
%J Differencialʹnye uravneniâ
%D 1972
%P 199-213
%V 8
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1972_8_2_a0/
%G ru
%F DE_1972_8_2_a0