- Author: Dr. Brian Valerius (auth.)
- Language: German
- Year: 2005
- Author: Dr. Brian Valerius (auth.)
- Language: German
- Year: 2009
- Author: Brian Valerius (auth.)
- Language: German
- Year: 2017
- Author: Dr. Brian Valerius (auth.)
- Language: German
- Year: 2007
- Author: Professor Dr. Dr. Eric Hilgendorf Dr. Thomas Frank Dr. Brian Valerius (auth.)
- Language: German
- Year: 2005
- Author: Dr. Brian Valerius (auth.)
- Language: German
- Year: 2009