TY  - BOOK
AU  - Perko, Lawrence
TI  - Differential equations and dynamical systems
SN  - 0387947787
U1  - 515.353 
PY  - 1996///
CY  - New York
PB  - Springer-Verlag
KW  - Differential equations, Nonlinear
KW  - Differential dynamical systems
ER  -