%0 Journal Article
%A S. S. Ivanov
%A D. Ya. Petrina
%T Equations arising in the summation of perturbation-theory series for the scattering matrix
%J Doklady Akademii Nauk
%D 1969
%P 776-779
%V 188
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1969_188_4_a12/
%G ru
%F DAN_1969_188_4_a12