%0 Journal Article
%A A. I. Vagabov
%T Summation of $n$-multiple expansions in principal functions of

%J Doklady Akademii Nauk
%D 1989
%P 20-23
%V 309
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1989_309_1_a2/
%G ru
%F DAN_1989_309_1_a2