%% You should probably cite draft-ietf-sipcore-event-rate-control instead of this I-D.
@techreport{niemi-sipping-event-throttle-08,
    number =    {draft-niemi-sipping-event-throttle-08},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-niemi-sipping-event-throttle/08/},
    author =    {Aki Niemi and Krisztian Kiss and Salvatore Loreto},
    title =     {{Session Initiation Protocol (SIP) Event Notification Extension for Notification Throttling}},
    pagetotal = 23,
    year =      2009,
    month =     feb,
    day =       22,
    abstract =  {This memo specifies the throttle, forge and average mechanisms for adjusting the rate of Session Initiation Protocol (SIP) event notifications. These mechanisms can be applied in subscriptions to all SIP event packages, but in particular the throttle mechanism is especially designed to be used in combination with a subscription to a Resource List Server (RLS).},
}