%0 Journal Article
%A N. N. Yakovlev
%T Asymptotic estimates of the densities of lattice $k$-packings and $k$-coverings, and the structure of the spectrum of the Schr\"odinger operator with a periodic potential
%J Doklady Akademii Nauk
%D 1984
%P 54-57
%V 276
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1984_276_1_a12/
%G ru
%F DAN_1984_276_1_a12