TY  - BOOK
AU  - Karpeshina Yulia E
TI  - Perturbation theory for the Schrodinger operator with a periodic potential
SN  - 3-540-63136-4
U1  - 515.35 
PY  - 1997///
CY  - Berlin
PB  - Springer-Verlag
KW  - Perturbation theory
KW  - Schrodinger operator
ER  -