ultimately lost. Zuckerman posited that the early chronology of the Rus' had to be re-determined in light of these sources. Among the beliefs of Zuckerman and others who have analyzed these sources are that the Khazars did not lose Kiev until the early 10th century (rather than 882, the traditional date), that Igor was not Rurik's son but rather a more distant descendant, and that Oleg did not immediately follow Rurik, but rather that there is a lost generation between the legendary Varangian lord and his documented successors. Further reading References External links Bibliography of Khazar Studies Khazar Self Perception: A Study of the Schechter Text Khazar diplomacy and documents Manuscripts from the Cairo Geniza Manuscripts in Cambridge