TY  - JOUR
AU  - I. V. Kamenev
TI  - V.\,A.~Kondrat'ev's theorem on the distribution of zeros of solutions of a second-order linear differential equation
JO  - Differencialʹnye uravneniâ
PY  - 1981
SP  - 598
EP  - 603
VL  - 17
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1981_17_4_a2/
LA  - ru
ID  - DE_1981_17_4_a2
ER  -