TY  - JOUR
AU  - L. B. Zelenko
TI  - Conditions for the semiboundedness and discreteness of the spectrum of the Sturm--Liouville operator on the semi-axis
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 1967
SP  - 31
EP  - 40
IS  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_1967_9_a3/
LA  - ru
ID  - IVM_1967_9_a3
ER  -