| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Discrete Mathematics: Proof Techniques and Mathematical Structures | 978-981-02-4088-2 (981-02-4088-0) | 1999 | |
| Woods Hole Mathematics: Perspectives In Mathematics And Physics | 978-981-256-021-6 (981-256-021-1) | 2004 | Nils Tongring |
C.P. · R. C. · R. C. Penner · R. Clark · R. P. · Robert C. · Robert C. Penner · Robert Clark · Robert P. · Robert Penner