Piran Mtakatifu
Rev. Charles William Boase, M.A. (Fellow and Tutor of Exeter College, Oxford). PIRANUS, ST. In: William Smith and Henry Wace. A Dictionary of Christian Biography, Literature, Sects and Doctrines During the First Eight Centuries. Volume IV: N-Z. London: John Murray, Albemarle Street, 1887. pp. 404-405.