| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| 21st Century Algebraic Relations | 978-0-9566315-9-6 (0-9566315-9-2) | 2017 |
| The Foundation of Mathematics | 978-0-9566315-0-3 (0-9566315-0-9) | 2010 |
C.R. · C. Roberts · Colin Roberts · M.C. · m r · M. Roberts · Michael C. · Michael C. Roberts · Michael R. · Michael Roberts