%0 Journal Article
%A L. Kh. Liberman
%T Some problems in the theory of approximating solutions of differential-operator equations in Hilbert space
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1964
%P 88-92
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1964_3_a12/
%G ru
%F IVM_1964_3_a12