- Author: Arie Molendijk, Justin Beaumont, Christoph Jedan
- Language: English
- Year: 2010
- Author: Ludger Jansen (editor), Christoph Jedan (editor)
- Language: German
- Year: 2010
- Author: Christoph Jedan
- Language: English
- Year: 2009
- Author: Christoph Jedan
- Language: German
- Year: 2000
- Author: Christoph Jedan
- Language: English
- Year: 2010