TY  - JOUR
AU  - B. Shmuttsler
TI  - Estimates for the number of points of the negative spectrum of a class of pseudodifferential operators
JO  - Vestnik Moskovskogo universiteta. Matematika, mehanika
PY  - 1990
SP  - 3
EP  - 5
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/VMUMM_1990_4_a0/
LA  - ru
ID  - VMUMM_1990_4_a0
ER  -