@misc{ rfc3864, author = {Graham Klyne and Mark Nottingham and Jeffrey C. Mogul}, title = {Registration Procedures for Message Header Fields}, howpublished = {Internet RFC 3864}, month = {September}, year = {2004}, topic = {http[0.9] smtp[0.9] mime[0.9] usenetnews[0.9]}, abstract = {This specification defines registration procedures for the message header fields used by Internet mail, HTTP, Netnews and other applications.} }