TY  - BOOK
AU  - Agarwal, Ravi P.
AU  - O'Regan, Donal
TI  - An introduction to ordinary differential equations 
SN  - 0387712758
AV  - QA372 .A43 2008 c.1
PY  - 2008///
CY  - New York
PB  - Springer
KW  - Differential equations
ER  -