- Author: Jörgen Schäfer (editor), Peter Gendolla (editor)
- Language: English
- Year: 2015
- Author: Peter Gendolla (editor), Jörgen Schäfer (editor)
- Language: English
- Year: 2015
- Author: Peter Gendolla (editor), Jörgen Schäfer (editor)
- Language: German
- Year: 2015