@techreport{niccolini-sipping-spam-feedback-00,
    number =    {draft-niccolini-sipping-spam-feedback-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-niccolini-sipping-spam-feedback/00/},
    author =    {Saverio Niccolini and Kai Fischer and Dan Wing and Martin Stiemerling and Hannes Tschofenig},
    title =     {{Spam feedback for SIP}},
    pagetotal = 12,
    year =      2008,
    month =     feb,
    day =       15,
    abstract =  {This document gives on overview of possible mechanisms for SIP UAs to feedback spam information to the system (e.g. other SIP entities like upstream SIP proxies) thus they can use this information for handling subsequent calls (e.g. blacklist the caller, input this info to reputation systems, compute spam-specific caller statistics, etc.).},
}