TY  - JOUR
AU  - M. V. Fedoryuk
TI  - Asymptotic methods in the theory of ordinary linear differential equations
JO  - Sbornik. Mathematics
PY  - 1969
SP  - 451
EP  - 491
VL  - 8
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1969_8_4_a1/
LA  - en
ID  - SM_1969_8_4_a1
ER  -