%0 Journal Article
%A S. I. Vetchinkin
%T A method of determining optimal wave functions for an approximate calculation of matrix elements
%J Doklady Akademii Nauk
%D 1962
%P 1328-1331
%V 147
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1962_147_6_a17/
%G ru
%F DAN_1962_147_6_a17