TY  - JOUR
AU  - V. V. Basov
AU  - A. V. Skitovich
TI  - A Generalized Normal Form and Formal Equivalence of Two-Dimensional Systems with Quadratic Zero Approximation: I
JO  - Differencialʹnye uravneniâ
PY  - 2003
SP  - 1016
EP  - 1029
VL  - 39
IS  - 8
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_2003_39_8_a1/
LA  - ru
ID  - DE_2003_39_8_a1
ER  -