1. Nees
Institute for Biodiversity of Plants, Rheinische Friedrich-Wilhelms-University, 53115 Bonn, Germany
2. Department
of Mechanical Engineering, Westphalian University of Applied Sciences, 46397 Bocholt, Germany
3. Department
of Biomimetics, Faculty of Nature and Technique, Bremen University of Applied Sciences, 28199 Bremen, Germany
4. Faculty
of Life Sciences, Rhine-Waal University of Applied Sciences, 47533 Kleve, Germany