TY  - JOUR
AU  - Yu. E. Karpeshina
TI  - The theory of perturbations for a polyharmonic operator with non-smooth periodic potential
JO  - Zapiski Nauchnykh Seminarov POMI
PY  - 1988
SP  - 76
EP  - 83
VL  - 169
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ZNSL_1988_169_a8/
LA  - ru
ID  - ZNSL_1988_169_a8
ER  -