TY  - JOUR
AU  - G. S. Zaitseva
TI  - Certain criteria for the non-oscillation of linear differential operators
JO  - Doklady Akademii Nauk
PY  - 1967
SP  - 1263
EP  - 1264
VL  - 177
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1967_177_6_a2/
LA  - ru
ID  - DAN_1967_177_6_a2
ER  -