TY  - JOUR
AU  - M. G. Gasymov
AU  - V. V. Zhikov
AU  - B. M. Levitan
TI  - Conditions for discreteness and finiteness of the negative spectrum of Schr\"odinger's operator equation
JO  - Matematičeskie zametki
PY  - 1967
SP  - 531
EP  - 538
VL  - 2
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1967_2_5_a10/
LA  - ru
ID  - MZM_1967_2_5_a10
ER  -