TY  - DATA
AU  - Yulia E. Karpeshina
TI  - Perturbation Theory for the Schrödinger Operator with a Periodic Potential
SN  - 9783540691563
PY  - 1997///
PB  - Springer Berlin Heidelberg
KW  - Mathematics and Statistics
UR  - https://doi.org/10.1007/BFb0094264
ER  -