%% You should probably cite draft-ietf-sigtran-rfc4233update instead of this I-D.
@techreport{tuexen-sigtran-rfc4233update-00,
    number =    {draft-tuexen-sigtran-rfc4233update-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-tuexen-sigtran-rfc4233update/00/},
    author =    {Michael Tüxen and Ken Morneault},
    title =     {{TEI Query Request Number Change}},
    pagetotal = 6,
    year =      2006,
    month =     jun,
    day =       20,
    abstract =  {The IUA protocol described in RFC4233 defines the messages type of TEI Query Request messages as 5. But this number is already used by the IUA extension DUA described in RFC4129. This document updates IUA such that the message type of TEI Query Request messages is 8.},
}