%0 Journal Article
%A V. A. Il'in
%T On fundamental function systems of Laplace's operator in an arbitrary region and on asymptotic estimates of the fundamental numbers
%J Doklady Akademii Nauk
%D 1967
%P 25-28
%V 177
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1967_177_1_a5/
%G ru
%F DAN_1967_177_1_a5