Backhuys Publishers · CRC Press
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Evolution and Systematics of the Crassulaceae | 978-90-73348-46-2 (90-73348-46-3) | 1995 | Henk 't Hart · Urs Eggli |
| Sedums of Europe - Stonecrops and Wallpeppers | 978-90-5809-594-7 (90-5809-594-0) | 2003 | Henk 't Hart · Urs Eggli |