| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Gravity and the Behavior of Unicellular Organisms: 40 | 978-0-521-82052-3 (0-521-82052-9) | 2005 | Donat-Peter Häder · Ruth Hemmersbach |
| Gravity and the Behavior of Unicellular Organisms | 978-0-511-54621-1 (0-511-54621-1) | 2009 | Donat-Peter Häder · Ruth Hemmersbach |