- Author: David Brauner, Axel Stähler
- Language: English
- Year: 2015
- Author: Axel Stähler, Klaus Stierstorfer
- Language: English
- Year: 2009
- Author: Axel Stähler
- Language: English
- Year: 2018
- Author: Rüdiger Ahrens (editor), Klaus Stierstorfer (editor), Florian Kläger (editor), Axel Stähler (editor)
- Language: English
- Year: 2013