TY  - BOOK
AU  - Arrowsmith, D. K
AU  - Place, C. M
TI  - Ordinary differential equations: a qualitative approach with applications 
SN  - 0-412-22610-3
AV  - QA 372 A74.1982
PY  - 1992///
CY  - London
PB  - Chapman & Hall
KW  - Ecuaciones diferenciales
ER  -