Diablova, K. 2018. Features of the Transfiguration Worship in the east Slavic singing orthodox tradition in the late XIV — the first half of the XV centuries in the context of the church charter changing process. Music art and culturе. 26 (Apr. 2018), 135-148. DOI:https://doi.org/https://doi.org/10.31723/2524-0447-2018-26-135-148.