| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Oscillation Theory for Difference and Functional Differential Equations | 978-0-7923-6289-0 (0-7923-6289-6) | 2000 | R.P. Agarwal · Donal O'Regan |
| Oscillation Theory for Second Order Dynamic Equations | 978-0-415-30074-2 (0-415-30074-6) | 2002 | Ravi P. Agarwal · Donal O'Regan |