Pelenski 1988, p. 776. Pelenski, Jaroslaw (1988). "The Contest for the "Kievan Succession" (1155–1175): The Religious-Ecclesiastical Dimension". Harvard Ukrainian Studies. 12/13: 761–780. JSTOR41036344. Reprinted in Pelenski (1998), The Contest for the Legacy of Kievan Rus'.