- Author: Christian Fischer
- Language: German
- Year: 2007
- Author: Robert Peters, Christian Fischer, Norbert Nagel
- Language: German
- Year: 2017
- Author: Robert Peters, Christian Fischer, Norbert Nagel
- Language: German
- Year: 2017
- Author: Hugues Angot Christian Fischer Baudouin Theunissen Charles Van Wymeersch
- Language: French
- Year: 2004
- Author: Christian Fischer Kirstin Casemir
- Language: German
- Year: 2013
- Author: Christian Fischer, Monika Hartmann
- Language: English
- Year: 2010
- Author: Christian Fischer Monika Hartmann
- Language: English
- Year: 2010