TY  - JOUR
AU  - A. V. Osipov
TI  - On the question of the existence of a transformation to normal form
JO  - Differencialʹnye uravneniâ
PY  - 1973
SP  - 1149
EP  - 1150
VL  - 9
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1973_9_6_a20/
LA  - ru
ID  - DE_1973_9_6_a20
ER  -