Hafez, Ihsan, Stephenson, F. Richard, and Orchiston, Wayne (2011) Άbdul-Ramān al-Şūfī and his Book of the Fixed Stars: a journey of re-discovery. In: Orchiston, Wayne, Nakamura, Tsuko, and Strom, Richard G., (eds.) Highlighting the History of Astronomy in the Asia-Pacific Region: proceedings of the ICOA-6 conference. Astrophysics and Space Science Proceedings . Springer, New York, USA, pp. 121-138.

Stephenson, F. Richard (2007) Variations in the Earth's clock error ΔT between AD 300 and 800 as deduced from observations of solar and lunar eclipses. Journal of Astronomical History and Heritage, 10 (3). pp. 211-220.