TY  - BOOK
AU  - Chow,S-N.,et al
ED  - Li, C
ED  - Wang, D
TI  - Normal forms & bifurcation of planar vector fields
SN  - 9780521372268
U1  - 6.07+12.01 
PY  - 1994///
CY  - Cambridge
PB  - Cambridge University Press
ER  -