COMMENTARY - Online: Online resources on the Didache can be found at:

• http://www.earlychristianwritings.com/didache.html
• http://www.geocities.com/rik_turner/on_the_didache.html

COMMENTARY - Books:

• The Didache (Hermeneia), by Kurt Niederwimmer and Harold W. Attridge, translated by Linda M. Maloney (Philadelphia: Fortress, 1998) - an excellent resource
• See also http://www.bibletexts.com/bibliogr/12his-nt.htm#non-canonical-texts.