^Elliot (2005), JK, Absent witnesses?, p. 50, in The Reception of the New Testament in the Apostolic Fathers, Gregory, Andrew F. & Tuckett, Christopher Mark,(eds), Oxford University Press, ISBN978-0-19-926782-8
Further reading
Wouters (1988), Alfons, The Chester Beatty Codex AC 1499, a Graeco-Latin lexicon on the Pauline Epistles, and a Greek grammar, Peeters, ISBN978-90-6831-124-2
Dickey (2019), Emily A Re-Examination of New Testament Papyrus P99 (Vetus Latina AN glo Paul), New Testament Studies. Cambridge University Press, 65(1), pp. 103–121. https://doi.org/10.1017/S0028688518000243.