%% You should probably cite rfc3487 instead of this I-D.
@techreport{ietf-ieprep-sip-reqs-02,
    number =    {draft-ietf-ieprep-sip-reqs-02},
    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-ieprep-sip-reqs/02/},
    author =    {Henning Schulzrinne},
    title =     {{Requirements for Resource Priority Mechanisms for the Session Initiation Protocol (SIP)}},
    pagetotal = 17,
    year =      2002,
    month =     dec,
    day =       2,
    abstract =  {This document summarizes requirements for prioritizing access to circuit-switched network, end system and proxy resources for emergency preparedness communications using the Session Initiation Protocol (SIP). This memo provides information for the Internet community.},
}