TY  - JOUR
AU  - Yu. E. Karpeshina
TI  - Perturbation theory for the Schr\"odinger operator with periodic potential
JO  - Informatics and Automation
PY  - 1990
SP  - 88
EP  - 116
VL  - 188
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TRSPY_1990_188_a4/
LA  - ru
ID  - TRSPY_1990_188_a4
ER  -