TY  - BOOK
AU  - Karpeshina,Y.E
TI  - Perturbation theory for the schrodinger operator with a periodic potential
T2  - Lecture notes in mathematics 1663
SN  - 9783540631361
U1  - 4.04+10.04 
PY  - 1997///
CY  - Berlin
PB  - Springer
ER  -