^Petersen, William, Patristic Biblical Quotations and Method: Four Changes to Lightfoot's Edition of "Second Clement", Vigiliae Christianae (Brill), November 2006, 60 (4): 389–419, ISSN 0042-6032, JSTOR 20474780, doi:10.1163/157007206778926292
^Holmes, Michael, Apostolic Fathers, The: Greek Texts and English Translations, Grand Rapids: Baker Academic, 1 November 2007 [2012-11-27], ISBN 978-0-8010-3468-8