TY  - BOOK
AU  - Perko, Lawrence
TI  - Differential equations and dynamical systems [3rd. ed.]
SN  - 9788181281838
U1  - 515.353 
PY  - 2001///
CY  - New York
PB  - Springer-Verlag
KW  - Differential equations, Nonlinear
KW  - Differentiable dynamical systems
ER  -