%0 Journal Article
%A V. R. Portnov
%T Normal solvability in the sense of Hausdorff of a certain nonlinear problem
%J Differencialʹnye uravneniâ
%D 1973
%P 1707-1717
%V 9
%N 9
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1973_9_9_a16/
%G ru
%F DE_1973_9_9_a16