@misc{rfc5621,
    series =    {Request for Comments},
    number =    5621,
    howpublished =  {RFC 5621},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC5621},
    url =       {https://www.rfc-editor.org/info/rfc5621},
    author =    {Gonzalo Camarillo},
    title =     {{Message Body Handling in the Session Initiation Protocol (SIP)}},
    pagetotal = 19,
    year =      2009,
    month =     sep,
    abstract =  {This document specifies how message bodies are handled in SIP. Additionally, this document specifies SIP user agent support for MIME (Multipurpose Internet Mail Extensions) in message bodies. {[}STANDARDS-TRACK{]}},
}