@misc{rfc4032,
    series =    {Request for Comments},
    number =    4032,
    howpublished =  {RFC 4032},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC4032},
    url =       {https://www.rfc-editor.org/info/rfc4032},
    author =    {Gonzalo Camarillo and Paul Kyzivat},
    title =     {{Update to the Session Initiation Protocol (SIP) Preconditions Framework}},
    pagetotal = 10,
    year =      2005,
    month =     mar,
    abstract =  {This document updates RFC 3312, which defines the framework for preconditions in SIP. We provide guidelines for authors of new precondition types and describe how to use SIP preconditions in situations that involve session mobility. {[}STANDARDS-TRACK{]}},
}