%% You should probably cite draft-ietf-soc-overload-control instead of this I-D.
@techreport{gurbani-soc-overload-control-02,
    number =    {draft-gurbani-soc-overload-control-02},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-gurbani-soc-overload-control/02/},
    author =    {Henning Schulzrinne and Volker Hilt and Vijay K. Gurbani},
    title =     {{Session Initiation Protocol (SIP) Overload Control}},
    pagetotal = 17,
    year =      2010,
    month =     aug,
    day =       23,
    abstract =  {Overload occurs in Session Initiation Protocol (SIP) networks when SIP servers have insufficient resources to handle all SIP messages they receive. Even though the SIP protocol provides a limited overload control mechanism through its 503 (Service Unavailable) response code, SIP servers are still vulnerable to overload. This document defines an overload control mechanism for SIP.},
}