- Author: Yvonne von Bischopinck Michael Ceyp (auth.)
- Language: German
- Year: 2009
- Author: Yvonne von Bischopinck, Michael H Ceyp
- Language: German
- Year: 2007
- Author: Yvonne von Bischopinck Michael Ceyp (auth.)
- Language: German
- Year: 2009
- Author: Yvonne von Bischopinck Michael Ceyp (auth.)
- Language: German
- Year: 2009