- Author: Enderlein Heinz, Kunert Uwe
- Language: German
- Year: 1992
- Author: Drope Katharina
- Language: German
- Year: 2002
- Author: Banke Bernd Erich
- Language: German
- Year: 1991
- Author: Sebastian Conrad
- Language: German
- Year: 1999
- Author: Colin Read
- Language: English
- Year: 1985
- Author: Niall Campbell
- Language: English
- Year: 2016