Pletneva, E. and Shchepkina, N. 2022. Theta Combinations in the Stichera of the Transfiguration: Case Study of the 10-13th Century Greek and Russian Manuscripts. Journal of the International Society for Orthodox Music. 6, 1 (Nov. 2022), 107–123. DOI:https://doi.org/10.57050/jisocm.113548.