%% You should probably cite rfc2778 instead of this I-D.
@techreport{ietf-impp-model-03,
    number =    {draft-ietf-impp-model-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-ietf-impp-model/03/},
    author =    {Hiroyasu Sugano and Mark Day and Jonathan Rosenberg},
    title =     {{A Model for Presence and Instant Messaging}},
    pagetotal = 17,
    year =      1999,
    month =     sep,
    day =       1,
    abstract =  {This document defines an abstract model for a presence and instant messaging system. It defines the various entities involved, defines terminology, and outlines the services provided by the system. This memo provides information for the Internet community.},
}