%0 Journal Article
%A A. M. Evseev
%T Ground energy level of helium, as calculated using integrals over trajectories
%J Doklady Akademii Nauk
%D 1969
%P 1197-1199
%V 189
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1969_189_6_a8/
%G ru
%F DAN_1969_189_6_a8