TY  - JOUR
AU  - A. Yu. Levin
TI  - Classification of no-oscillation cases for equation $\ddot{x}+p(t)\dot{x}+q(t)x=0$ where $q (t)$ is of constant sign
JO  - Doklady Akademii Nauk
PY  - 1966
SP  - 1037
EP  - 1040
VL  - 171
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1966_171_5_a6/
LA  - ru
ID  - DAN_1966_171_5_a6
ER  -