Sogdiana
Litvinski, B. A., A. H. Jalilov, A. I. Kolesnikov (1999), "The Arab Conquest", in History of Civilizations of Central Asia: Volume III, the Crossroads of Civilizations: A.D. 250–750, B. A. Litvinski, Zhang Guangda, and R. Shabani Samghabadi (eds.). Delhi: Motilal Banarsidass Publishers Private Limited, pp. 449–472.