%0 Journal Article
%A O. A. Liskovets
%T Incorrect problems with a closed non-invertible operator
%J Differencialʹnye uravneniâ
%D 1967
%P 636-646
%V 3
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1967_3_4_a5/
%G ru
%F DE_1967_3_4_a5