- Author: Ahmed M. El-Masry
- Language: German
- Year: 1992
- Author: Klaus Schwarz, Gerd Winkelhane
- Language: German
- Year: 1987
- Author: Tim Epkenhans
- Language: German
- Year: 2001
- Author: Mohammad-Nauman Khan
- Language: German
- Year: 1995
- Author: Annette Kaiser
- Language: German
- Year: 2000
- Author: Josef Matuz
- Language: German
- Year: 1987
- Author: Gabriela Linda Guellil
- Language: German
- Year: 1986