%% You should probably cite rfc3702 instead of this I-D.
@techreport{ietf-sipping-aaa-req-04,
    number =    {draft-ietf-sipping-aaa-req-04},
    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-aaa-req/04/},
    author =    {Gonzalo Camarillo and John A. Loughney},
    title =     {{Authentication, Authorization, and Accounting Requirements for the Session Initiation Protocol (SIP)}},
    pagetotal = 15,
    year =      2003,
    month =     dec,
    day =       16,
    abstract =  {As Session Initiation Protocol (SIP) services are deployed on the Internet, there is a need for authentication, authorization, and accounting of SIP sessions. This document sets out the basic requirements for this work. This memo provides information for the Internet community.},
}