%0 Journal Article
%A Liu Yi-chen
%A I. T. Todorov
%T Integral representation of vertex part in perturbation theory
%J Doklady Akademii Nauk
%D 1963
%P 806-809
%V 148
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1963_148_4_a18/
%G ru
%F DAN_1963_148_4_a18