%% You should probably cite rfc4483 instead of this I-D.
@techreport{ietf-sip-content-indirect-mech-05,
    number =    {draft-ietf-sip-content-indirect-mech-05},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-sip-content-indirect-mech/05/},
    author =    {Eric Burger},
    title =     {{A Mechanism for Content Indirection in Session Initiation Protocol (SIP) Messages}},
    pagetotal = 17,
    year =      2004,
    month =     oct,
    day =       27,
    abstract =  {This document defines an extension to the URL MIME External-Body Access-Type to satisfy the content indirection requirements for the Session Initiation Protocol (SIP). These extensions are aimed at allowing any MIME part in a SIP message to be referred to indirectly via a URI. {[}STANDARDS-TRACK{]}},
}