1. Andrén, Olof och Per Beskow, De apostoliska fäderna (2:a uppl.; Malmö: Artos, 2006)
2. Ascough, Richard, ”What Are They Now Saying about Christ Groups and Associations?” Currents in Biblical Research 13/2 (2015), 207–244
3. Barber Lightfoot, Joseph, ”Two Neglected Facts Bearing on the Ignatian Controversy”, Journal of Philology 1 (1868): 47–55
4. Bart, Ehrman, The Apostolic Fathers I (Cambridge, Massachusetts: Harvard University Press, 2003)
5. Brent, Allen, Ignatius of Antioch and the Second Sophistic: A Study of an Early Christian Transformation of Pagan Culture (STAC, 36; Tübingen: Mohr Siebeck, 2006)