- Author: Eckhard Frick (editor), Konrad Hilpert (editor)
- Language: German
- Year: 2020
- Author: Eckhard Frick (editor), Konrad Hilpert (editor)
- Language: German
- Year: 2020
- Author: Godehard Brüntrup (editor), Eckhard Frick (editor)
- Language: German
- Year: 2022
- Author: Eckhard Frick (editor), Lydia Maidl (editor)
- Language: German
- Year: 2019
- Author: Eckhard Frick (editor), Lydia Maidl (editor)
- Language: German
- Year: 2019
- Author: Godehard Brüntrup (editor), Eckhard Frick (editor)
- Language: German
- Year: 2022