| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| HyperTaxonomy: A computer tool for revisional work | 978-87-87600-32-3 (87-87600-32-3) | 1995 |
| Tropical Forests: Botanical Dynamics, Speciation and diversity Abstracts from the AAU 25th Anniversary Symposium | 978-87-87600-26-2 (87-87600-26-9) | 1988 |