%0 Journal Article
%A V. V. Grushin
%T On the proof of the discreteness of the spectrum of one class of differential operators in $\mathbb{R}^n$
%J Funkcionalʹnyj analiz i ego priloženiâ
%D 1971
%P 71-72
%V 5
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/FAA_1971_5_1_a8/
%G ru
%F FAA_1971_5_1_a8