%0 Journal Article
%A I. M. Glazman
%T On the negative part of the spectrum of one-dimensional and multidimensional differential operators over vector-functions
%J Doklady Akademii Nauk
%D 1958
%P 421-424
%V 119
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1958_119_3_a4/
%G ru
%F DAN_1958_119_3_a4