- Author: Stefan Behling, Christian Brensing, Andreas Fuchs, Christoph Ingenhoven
- Language: English
- Year: 2013
- Author: Stefan Behling, Christian Brensing, Andreas Fuchs, Christoph Ingenhoven
- Language: German
- Year: 2009
- Author: Stefan Behling, Christian Brensing, Andreas Fuchs, Christoph Ingenhoven
- Language: English
- Year: 2013
- Author: Peter Mösle (editor), Michaela Lambertz (editor), Stefan Altenschmidt (editor), Christoph Ingenhoven (editor)
- Language: German
- Year: 2017