- Author: Margit Pfundstein, Roland Gellert, Martin Spitzner, Alexander Rudolphi
- Language: English
- Year: 2012
- Author: Margit Pfundstein, Alexander Rodolphi, Martin H. Spitzner, Roland Gellert
- Language: German
- Year: 2012
- Author: Margit Pfundstein, Roland Gellert, Martin Spitzner, Alexander Rudolphi
- Language: English
- Year: 2008