TY  - JOUR
AU  - A. G. Katranov
TI  - The zeros of the oscillatory solutions of the equation $x''+a(t)f(x)=0$
JO  - Differencialʹnye uravneniâ
PY  - 1971
SP  - 930
EP  - 933
VL  - 7
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1971_7_5_a16/
LA  - ru
ID  - DE_1971_7_5_a16
ER  -