TY  - JOUR
AU  - S. V. Petras
TI  - On a perturbation of the poles of scattering matrix for varying baundary condition
JO  - Zapiski Nauchnykh Seminarov POMI
PY  - 1981
SP  - 183
EP  - 191
VL  - 117
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ZNSL_1981_117_a12/
LA  - ru
ID  - ZNSL_1981_117_a12
ER  -