%0 Journal Article
%A A. E. Martynyuk
%T On a generalization of the variation method
%J Doklady Akademii Nauk
%D 1957
%P 374-377
%V 117
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1957_117_3_a4/
%G ru
%F DAN_1957_117_3_a4