%0 Journal Article
%A V. R. Portnov
%T Normal solvability of an abstract nonlinear problem. Applications to the solution of boundary value problems for partial differential equations
%J Doklady Akademii Nauk
%D 1971
%P 1028-1031
%V 196
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1971_196_5_a8/
%G ru
%F DAN_1971_196_5_a8