%% You should probably cite draft-ietf-sipcore-rfc3265bis instead of this I-D.
@techreport{roach-sipcore-rfc3265bis-00,
    number =    {draft-roach-sipcore-rfc3265bis-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-roach-sipcore-rfc3265bis/00/},
    author =    {Adam Roach},
    title =     {{SIP-Specific Event Notification}},
    pagetotal = 51,
    year =      2009,
    month =     mar,
    day =       3,
    abstract =  {This document describes an extension to the Session Initiation Protocol (SIP). The purpose of this extension is to provide an extensible framework by which SIP nodes can request notification from remote nodes indicating that certain events have occurred. Note that the event notification mechanisms defined herein are NOT intended to be a general-purpose infrastructure for all classes of event subscription and notification.},
}