%0 Journal Article
%A N. Yu. Orlov
%T A variational approach to the determination of the energy spectrum of bound electrons
%J Differencialʹnye uravneniâ
%D 1991
%P 1237-1245
%V 27
%N 7
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1991_27_7_a15/
%G ru
%F DE_1991_27_7_a15