TY  - BOOK
AU  - PERKO Lawrence
TI  - Differential equations and  dynamical systems
T2  - Texts in Applied Mathematics
SN  - 8181281837
U1  - B333, P1 
PY  - 2001///
CY  - New York
PB  - Springer-Verlag         
KW  - Economics
N1  - Bibliography : 541-542
ER  -