- Author: Manfred Berg, Klaus-Jürgen Bremm, Ronald D. Gerste, Michael Hochgeschwender, Torben Lütjen, Ute Planert, Ursula Prutsch, Georg Schild
- Language: German
- Year: 2023
- Author: Torben Lütjen
- Language: German
- Year: 2016
- Author: Torben Lütjen
- Language: German
- Year: 2016
- Author: Torben Lütjen
- Language: German
- Year: 2020