- Author: Kai Merten (editor), Claus-Michael Ort (editor)
- Language: German
- Year: 2021
- Author: Kai Merten (editor), Claus-Michael Ort (editor)
- Language: German
- Year: 2021
- Author: Michael Titzmann (editor), Wolfgang Lukas (editor), Claus-Michael Ort (editor)
- Language: German
- Year: 2011