TY  - BOOK
AU  - Perko,Lawrence
TI  - Differential equations and dynamical systems 
SN  - 9788181281838
U1  - 515.353 PER 
PY  - 2001///
CY  - New York
PB  - Springer
KW  - Differential equations, Nonlinear
KW  - Differentiable dynamical systems
ER  -