TY  - JOUR
AU  - V. M. Babich
TI  - Mechanical systems, proper oscilations, and spectral theory of selfadjoint operators
JO  - Zapiski Nauchnykh Seminarov POMI
PY  - 1994
SP  - 12
EP  - 16
VL  - 218
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ZNSL_1994_218_a1/
LA  - ru
ID  - ZNSL_1994_218_a1
ER  -