%0 Journal Article
%A M. Sh. Birman
%T On a test for the existence of wave operators
%J Doklady Akademii Nauk
%D 1962
%P 1008-1009
%V 147
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1962_147_5_a3/
%G ru
%F DAN_1962_147_5_a3