- Author: Wolgast Michael
- Language: German
- Year: 1997
- Author: Tolksdorf Norbert
- Language: German
- Year: 2002
- Author: Stotz Olaf
- Language: German
- Year: 2004
- Author: Skaruppe Martin
- Language: German
- Year: 1994
- Author: Schweizer Thilo
- Language: German
- Year: 1996