TY  - JOUR
AU  - V. M. Babich
TI  - The focussing problem and spectral function asymptotics of Laplace-- Beltrami operator.~II
JO  - Zapiski Nauchnykh Seminarov POMI
PY  - 1979
SP  - 14
EP  - 53
VL  - 89
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ZNSL_1979_89_a1/
LA  - ru
ID  - ZNSL_1979_89_a1
ER  -