TY  - JOUR
AU  - Yu. E. Karpeshina
TI  - Perturbation theory formulas for the Schrödinger equation with a nonsmooth periodic potential
JO  - Sbornik. Mathematics
PY  - 1992
SP  - 101
EP  - 123
VL  - 71
IS  - 1
UR  - http://geodesic.mathdoc.fr/item/SM_1992_71_1_a7/
LA  - en
ID  - SM_1992_71_1_a7
ER  -