%% You should probably cite rfc3959 instead of this I-D.
@techreport{ietf-sipping-early-disposition-03,
    number =    {draft-ietf-sipping-early-disposition-03},
    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-sipping-early-disposition/03/},
    author =    {Gonzalo Camarillo},
    title =     {{The Early Session Disposition Type for the Session Initiation Protocol (SIP)}},
    pagetotal = 11,
    year =      2004,
    month =     jun,
    day =       17,
    abstract =  {This document defines a new disposition type (early-session) for the Content-Disposition header field in the Session Initiation Protocol (SIP). The treatment of "early-session" bodies is similar to the treatment of "session" bodies. That is, they follow the offer/answer model. Their only difference is that session descriptions whose disposition type is "early-session" are used to establish early media sessions within early dialogs, as opposed to regular sessions within regular dialogs. {[}STANDARDS-TRACK{]}},
}