%0 Journal Article
%A Yu. P. Chuburin
%T On approximation of the “Membrane” Schrödinger operator by the “Crystal” operator
%J Matematičeskie zametki
%D 1997
%P 773-781
%V 62
%N 5
%U http://geodesic.mathdoc.fr/item/MZM_1997_62_5_a13/
%G ru
%F MZM_1997_62_5_a13