25.-29. September 2023, Bochum
7.-9. March 2023, Bochum
29.- 30. March 2022, Karlsruhe
3- 4 November 2021, Bonn
Tuesday, 14th September 2021
Digital Event 23-24 March 2021
12.-16. October 2020 at Welcome-Hotel Meschede at Hennesee
27.-28. February 2020 at Ruhr-University Bochum