@misc{rfc3864,
    series =    {Request for Comments},
    number =    3864,
    howpublished =  {RFC 3864},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC3864},
    url =       {https://www.rfc-editor.org/info/rfc3864},
    author =    {Graham Klyne and Mark Nottingham and Jeffrey Mogul},
    title =     {{Registration Procedures for Message Header Fields}},
    pagetotal = 17,
    year =      2004,
    month =     sep,
    abstract =  {This specification defines registration procedures for the message header fields used by Internet mail, HTTP, Netnews and other applications. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.},
}