| title | ISBN-13 (ISBN-10) | year of publication | |
|---|---|---|---|
| Arboreal Group Theory: Proceedings of a Workshop Held September 13-16, 1988 | 978-0-387-97518-4 (0-387-97518-7) | 1991 | |
| Arboreal Group Theory: Proceedings of a Workshop Held September 13-16, 1988: Workshop Proceedings | 978-3-540-97518-2 (3-540-97518-7) | 1991 |