TY  - BOOK
AU  - Walter Wolfgang
TI  - Ordinary differential equations
T2  - "Graduate Texts in Mathematics: Readings in Mathematics, 182."
SN  - 0387984593
U1  - "B331, N8" 
PY  - 1998///
CY  - N.
PB  - York Springer-Verlag      
KW  - Economics
ER  -