Oleksandr Chvartatskyi
(Alexander von Humboldt fellow)
Mathematical Institute, University of Göttingen, and Max Planck Institute for Dynamics and Self-Organization, Göttingen

Folkert Müller-Hoissen
Max Planck Institute for Dynamics and Self-Organization, Göttingen

Nikola Stoilov
Max Planck Institute for Dynamics and Self-Organization, Göttingen