%0 Journal Article
%A S. R. Umarov
%A È. M. Saidamatov
%T On conditions for the discreteness of the spectrum for a general pseudo-differential operator
%J Differencialʹnye uravneniâ
%D 1997
%P 133-135
%V 33
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1997_33_1_a19/
%G ru
%F DE_1997_33_1_a19