*Hagiography of St. Kassia from the Antiochian Orthodox Church*Kosta Simić, "Life According to Nature: Ascetic Ideals in a Sticheron by Kassia", Crkvene studije / Church Studies 6, The Centre of Church Studies, Niš 2009, pp.
* Simić K., «Life According to Nature: Ascetic Ideals in a Sticheron by Kassia», Crkvene studije / Church Studies 6, The Centre of Church Studies, Niš 2009, pp.