@misc{rfc4320,
    series =    {Request for Comments},
    number =    4320,
    howpublished =  {RFC 4320},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC4320},
    url =       {https://www.rfc-editor.org/info/rfc4320},
    author =    {Robert Sparks},
    title =     {{Actions Addressing Identified Issues with the Session Initiation Protocol's (SIP) Non-INVITE Transaction}},
    pagetotal = 7,
    year =      2006,
    month =     jan,
    abstract =  {This document describes modifications to the Session Initiation Protocol (SIP) to address problems that have been identified with the SIP non-INVITE transaction. These modifications reduce the probability of messages losing the race condition inherent in the non-INVITE transaction and reduce useless network traffic. They also improve the robustness of SIP networks when elements stop responding. These changes update behavior defined in RFC 3261. {[}STANDARDS-TRACK{]}},
}