| title | ISBN-13 | year of publication |
|---|---|---|
| Applied Discrete Structures | 978-0-470-21333-9 | 1993 |
| Foundations of Discrete Mathematics | 978-0-470-21152-6 | 1989 |
| Introduction to general topology | 978-0-470-27556-6 | 1985 |
| Introduction to General Topology | 978-0-85226-444-7 | 1983 |