Paul 2007, p. 258. Paul, Michael C. (March 2007). "Secular Power and the Archbishops of Novgorod before the Muscovite Conquest". Kritika: Explorations in Russian and Eurasian History. 8 (2): 231–270. doi:10.1353/kri.2007.0020. S2CID153403531.
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Paul 2007, p. 258. Paul, Michael C. (March 2007). "Secular Power and the Archbishops of Novgorod before the Muscovite Conquest". Kritika: Explorations in Russian and Eurasian History. 8 (2): 231–270. doi:10.1353/kri.2007.0020. S2CID153403531.