%0 Journal Article
%A G. S. Rozenberg
%T On the question of necessary and sufficient conditions for a minimum in variational problems
%J Differencialʹnye uravneniâ
%D 1968
%P 290-297
%V 4
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1968_4_2_a11/
%G ru
%F DE_1968_4_2_a11