- Author: Wolfgang Wildgen
- Language: German
- Year: 2014
- Author: Wolfgang Wildgen
- Language: English
- Year: 2023
- Author: Wolfgang Wildgen
- Language: German
- Year: 2010
- Author: Wolfgang Wildgen
- Language: German
- Year: 1977
- Author: Wolfgang Wildgen
- Language: German
- Year: 1977
- Author: Wolfgang Wildgen
- Language: German
- Year: 2010
- Author: Wolfgang Wildgen
- Language: English
- Year: 2023
- Author: Wolfgang Wildgen
- Language: German
- Year: 2000
- Author: Wolfgang Wildgen
- Language: English
- Year: 1994