TY  - JOUR
AU  - Yu. I. Kifer
TI  - The spectrum of some differential operators with a~small parameter multiplying highest derivatives
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1977
VL  - 32
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1977_32_5_a15/
LA  - ru
ID  - RM_1977_32_5_a15
ER  -