TY  - BOOK
AU  - De Coster, Colette
TI  - Two-point boundary value problems: Lower and upper solutions
U1  - 515.35 D34T 
PY  - 2006///
CY  - Oxford
PB  - Elsevier
N1  - 4108 08/10/2021 HBD21/8860 11/10/2021 Main Budget
ER  -