%0 Journal Article
%A G. M. Zhislin
%T On the existence of characteristic functions for Schrödinger's equation
%J Doklady Akademii Nauk
%D 1957
%P 931-934
%V 117
%N 6
%U http://geodesic.mathdoc.fr/item/DAN_1957_117_6_a1/
%G ru
%F DAN_1957_117_6_a1