TY  - JOUR
AU  - V. P. Maslov
TI  - A criterion for discreteness of the spectrum of a Sturm--Liouville equation with an operator coefficient (apropos the article by B.~M.~Levitan and G.~A.~Suvorchenkova)
JO  - Funkcionalʹnyj analiz i ego priloženiâ
PY  - 1968
SP  - 63
EP  - 67
VL  - 2
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FAA_1968_2_2_a6/
LA  - ru
ID  - FAA_1968_2_2_a6
ER  -