TY  - BOOK
AU  - Roussarie, Robert.
TI  - Bifurcations of planar vector fields and Hilbert's sixteenth problem
T2  - Progress in mathematics, Vol.164
SN  - 3764359005
U1  - 515.63 
PY  - 1998///
CY  - Basel
PB  - Birkhauser verlag
ER  -