TY  - JOUR
AU  - N. N. Yakovlev
TI  - 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
JO  - Doklady Akademii Nauk
PY  - 1984
SP  - 54
EP  - 57
VL  - 276
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1984_276_1_a12/
LA  - ru
ID  - DAN_1984_276_1_a12
ER  -