Satzinger, Helmut (2004). Some Peculiarities of Greek and Coptic Epigraphy from Nubia. In Coptic Studies on the Threshold of a New Millennium I. Proceedings of the Seventh International Congress of Coptic Studies, Leiden, 27 August - 2 September 2000. MA. 2004. p. 529. https://homepage.univie.ac.at/helmut.satzinger/Texte/EpigrNubia.pdf - p. 535