TY  - BOOK
AU  - Francoise J P
AU  - Roussarie R
TI  - Bifurcations of planar vector feilds
U1  - 515.35 
PY  - 1990///
CY  - Berlin
PB  - Springer Verlag
KW  - Bifurcations
KW  - Differential equations
KW  - Vector fields
ER  -