TY  - JOUR
AU  - S. A. Mazanik
TI  - The structure of the approximation function for a linear differential equation
JO  - Differencialʹnye uravneniâ
PY  - 1986
SP  - 542
EP  - 545
VL  - 22
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1986_22_3_a24/
LA  - ru
ID  - DE_1986_22_3_a24
ER  -