%0 Journal Article
%A A. M. Ermolaev
%T Perturbation theory for the expansion coefficients of two-electron wave function
%J Doklady Akademii Nauk
%D 1967
%P 1302-1305
%V 177
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1967_177_6_a13/
%G ru
%F DAN_1967_177_6_a13