%0 Journal Article
%A D. M. Fage
%T Approximate solution of a nonlinear problem with constraint for a two- dimensional elliptic equation
%J Doklady Akademii Nauk
%D 1980
%P 531-534
%V 255
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1980_255_3_a2/
%G ru
%F DAN_1980_255_3_a2