%0 Journal Article
%A V. M. Savchin
%T A criterion for the existence of generalized integral variational principles for given equations
%J Differencialʹnye uravneniâ
%D 1993
%P 1425-1432
%V 29
%N 8
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1993_29_8_a16/
%G ru
%F DE_1993_29_8_a16