%0 Journal Article
%A M. A. Shubin
%T Essentiality of the spectrum of pseudodifferential operators in the Besicovitch space $B^2(\mathbf{R}^n)$
%J Vestnik Moskovskogo universiteta. Matematika, mehanika
%D 1982
%P 56-59
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/VMUMM_1982_5_a15/
%G ru
%F VMUMM_1982_5_a15