%0 Journal Article
%A B. N. Delone
%A S. S. Ryshkov
%T A contribution to the theory of the extrema of a multi-dimensional $\zeta$-function
%J Doklady Akademii Nauk
%D 1967
%P 991-994
%V 173
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1967_173_5_a0/
%G ru
%F DAN_1967_173_5_a0