%% You should probably cite draft-holmberg-sipcore-rfc4028bis instead of this I-D.
@techreport{ietf-sipcore-sessiontimer-race-00,
    number =    {draft-ietf-sipcore-sessiontimer-race-00},
    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-sipcore-sessiontimer-race/00/},
    author =    {Christer Holmberg},
    title =     {{Session Initiation Protocol (SIP) Session Timer Glare Handling}},
    pagetotal = 8,
    year =      2017,
    month =     oct,
    day =       4,
    abstract =  {This document updates RFC 4028, by clarifying the procedures for negotiating usage of the Session Initiation Protocol (SIP) session timer mechansim, in order to avoid a race condition where both endpoints trigger simultaneous negotiations.},
}