Annewies van den Hoek and John J. Herrmann, Jr., “Thecla the Beast Fighter: A Female Emblem of Deliverance in Early Christian Popular Art,” The Studia Philonica Annual: Studies in Hellenistic Judaism, 13 (2001), pp. 212–249; see also Herrmann and van den Hoek, Light from the Age of Augustine (Cambridge, MA: Harvard Divinity School, 2002), pl. 49.