%0 Journal Article
%A V. R. Portnov
%T S.\,L.~Sobolev projection operators for seminorms with infinite-dimensional kernels
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1976
%P 252-263
%V 140
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TM_1976_140_a13/
%G ru
%F TM_1976_140_a13