Успенский, Б. А. “M. Lomonosov on the Correlation Between Church Slavonic, Old Russian and ‘Old Slavonic’ (On the Materials of His Note on Shliotser)”. Kalbotyra 39, no. 2 (December 1, 1988): 13–20. Accessed August 17, 2024. https://www.journals.vu.lt/kalbotyra/article/view/31060.