TY  - BOOK
AU  - Dumortier Freddy
AU  - Artes Joan C
AU  - Llibre Jaume
TI  - Qualitative theory of planar differential systems
SN  - 3-540-32893-9
U1  - 515.35 
PY  - 2006///
CY  - Berlin
PB  - Springer-Verlag
KW  - Differential equations
KW  - Numerical solutions
KW  - Qualitative theory
ER  -