- Author: Saunders Nicholas J
- Language: English
- Year: 2011
- Author: Morgan Catherine
- Language: English
- Year: 2003
- Author: Bloedhorn Hanswulf, Galor Katharina
- Language: English
- Year: 2013
- Author: Rieche Anita
- Language: German
- Year: 1999
- Author: Kraus Stefan, Rieche Anita
- Language: German
- Year: 1995