- Author: Hawting Gerald R., Omaijaden
- Language: English
- Year: 2006
- Author: Hoyland Robert G
- Language: English
- Year: 2001
- Author: Crone Patricia
- Language: English
- Year: 2004
- Author: Hoyland Robert G
- Language: English
- Year: 2017
- Author: Tobias Sahl Andersson
- Language: English
- Year: 2019