- Author: Steiner Peter
- Language: German
- Year: 1997
- Author: Lucke Claus
- Language: German
- Year: 2001
- Author: Klier Manfred
- Language: German
- Year: 1999
- Author: Erhardt Martin
- Language: German
- Year: 2001
- Author: Ibel Korbinian Dominic
- Language: German
- Year: 2001
- Author: Braun Stephan
- Language: German
- Year: 2007