%0 Journal Article
%A S. A. Shelepen'
%T An estimate of the norm of an inverse operator by the method of orthogonal complements
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1977
%P 124-126
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1977_2_a17/
%G ru
%F IVM_1977_2_a17