TY  - JOUR
AU  - A. Yu. Levin
TI  - Some questions on the asymptotics for ordinary linear differential equations
JO  - Doklady Akademii Nauk
PY  - 1975
SP  - 503
EP  - 506
VL  - 225
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1975_225_3_a5/
LA  - ru
ID  - DAN_1975_225_3_a5
ER  -