Alexandru, Maria, Athanasios Delios, Apostolia Gorgolitsa, Symeon Kanakis, Dimosthenis Spanoudakis, Dimos Papatzalakis, and Maria Chaleplidou. 2020. “‘Traditional Innovation’ in Byzantine Chant: The Case of Kalophonia”. Journal of the International Society for Orthodox Music 3 (January):39-63. https://journal.fi/jisocm/article/view/88715.