TY  - JOUR
AU  - I. V. Kamenev
TI  - On an asymptotic formula of Hartman in the theory of second-order linear equations
JO  - Differencialʹnye uravneniâ
PY  - 1987
SP  - 348
EP  - 350
VL  - 23
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1987_23_2_a21/
LA  - ru
ID  - DE_1987_23_2_a21
ER  -