Фаддеевна Ковязина, Надежда. “Invariant Entries and Gospel Lections in the Slavic Lectionary Menology of the 11–16th Cc. (September)”. Slavistica Vilnensis 49, no. 2 (December 1, 2000): 51–60. Accessed May 2, 2024. https://www.journals.vu.lt/slavistica-vilnensis/article/view/23119.