50.没有准确地呈现：Fennell, History of the Russian Church, 36-37；2016年7月20日与Paul Bushkovitch的私人交流。
51.一位名叫“弗拉基米尔”的罗斯统治者：Vladimir Minorsky (trans.), Sharaf al-Zaman tahir Marvazi on China, the Turks, and India: Arabic Text with an English Translation and Commentary (1942): 36.
52.“哲学家的演讲”：Alexander Pereswetoff-Morath, Grin Without a Cat (2002): 53-57.
53.紧密的经济和文化联系：Christian Raffensperger, Reimagining Europe: Kievan Rus’ in the Medieval World (2012): 164-166.
54.乌古斯人：C. Edmund Bosworth, “The Origins of the Seljuqs.” The Seljuqs: Politics, Society and Culture, ed. Christian Lange and Songül Mecit (2011): 13-21.
