%% You should probably cite rfc3087 instead of this I-D.
@techreport{campbell-sip-service-control-03,
    number =    {draft-campbell-sip-service-control-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-campbell-sip-service-control/03/},
    author =    {Ben Campbell and Robert Sparks},
    title =     {{Control of Service Context using SIP Request-URI}},
    pagetotal = 39,
    year =      2001,
    month =     feb,
    day =       12,
    abstract =  {This memo describes a useful way to conceptualize the use of the standard SIP (Session Initiation Protocol) Request-URI (Uniform Resource Identifier) that the authors and many members of the SIP community think is suitable as a convention. It does not define any new protocol with respect to RFC 2543. This memo provides information for the Internet community.},
}