%0 Journal Article
%A M. G. Gasymov
%A B. M. Levitan
%T On expansion in products of special solutions of two Sturm--Liouville equations
%J Doklady Akademii Nauk
%D 1990
%P 781-784
%V 310
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1990_310_4_a1/
%G ru
%F DAN_1990_310_4_a1