- Author: Sonnenberg Anika
- Language: German
- Year: 2019
- Author: Seitz Frederike
- Language: German
- Year: 2020
- Author: Schneider Birgit
- Language: German
- Year: 2007
- Author: Schachel Jens
- Language: German
- Year: 1979
- Author: Cicero Marcus Tullius
- Language: German
- Year: 1983
- Author: Tom Sutcliffe
- Language: English
- Year: 2014
- Author: Dudley J. Cowden
- Language: English
- Year: 2019
- Author: Dietrich Lüdemann
- Language: German
- Year: 1955