- Author: Trendelenburg Marie, Dettmer Ulf
- Language: German
- Year: 2005
- Author: Braun Thomas, Röhler gen. Riemer Annette, Weber Florian
- Language: German
- Year: 2006
- Author: Thomas Wenisch
- Language: German
- Year: 2009
- Author: Kurt Buser, Thomas Schneller, Klaus Wildgrube
- Language: German
- Year: 2007