TY  - JOUR
AU  - B. M. Levitan
AU  - G. A. Suvorchenkova
TI  - Sufficient conditions for a discrete spectrum in the case of a Sturm--Liouville equation with operator coefficients
JO  - Funkcionalʹnyj analiz i ego priloženiâ
PY  - 1968
SP  - 56
EP  - 62
VL  - 2
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FAA_1968_2_2_a5/
LA  - ru
ID  - FAA_1968_2_2_a5
ER  -