title: To the History of the Cimmerian Bosporus of the 10th-12th Centuries: In the Development of one Hypothesis of A. P. Kazhdan
abstract: In 1963 A. P. Kazhdan suggested that in the 12th century the Byzantine Empire controlled the territory of the former Tmutarakan’ principality and there was a certain Khazaria in that region at that time. Subsequently, this issue was constantly the subject of controversy in historiography. Some researchers supported the opinion of A. P. Kazhdan, some – did not agree with him. We analyzed the mentioning of Khazaria in various sources and concluded that this historical and geographical area in the 
journal: GRAPHOSPHAERA Writing and Written Practices