%0 Journal Article
%A V. N. Shapovalov
%T Separation of variables in a second-order linear differential equation
%J Differencialʹnye uravneniâ
%D 1980
%P 1864-1874
%V 16
%N 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1980_16_10_a14/
%G ru
%F DE_1980_16_10_a14