TY  - JOUR
AU  - I. V. Kamenev
TI  - Oscillation critieria for a linear second order equation that are connected with the existence of a ``principal'' solution
JO  - Differencialʹnye uravneniâ
PY  - 1973
SP  - 370
EP  - 373
VL  - 9
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1973_9_2_a23/
LA  - ru
ID  - DE_1973_9_2_a23
ER  -