TY  - JOUR
AU  - A. D. Bruno
TI  - The divergence of transformations to normal form of differential equations
JO  - Doklady Akademii Nauk
PY  - 1967
SP  - 1003
EP  - 1006
VL  - 174
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1967_174_5_a1/
LA  - ru
ID  - DAN_1967_174_5_a1
ER  -