%% You should probably cite draft-sparks-sipcore-invfix instead of this I-D.
@techreport{sparks-sip-invfix-03,
    number =    {draft-sparks-sip-invfix-03},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-sparks-sip-invfix/03/},
    author =    {Robert Sparks},
    title =     {{Correct transaction handling for 200 responses to Session Initiation Protocol INVITE requests}},
    pagetotal = 20,
    year =      2009,
    month =     mar,
    day =       2,
    abstract =  {This document normatively updates RFC 3261, the Session Initiation Protocol (SIP), to address an error in the specified handling of success (200 class) responses to INVITE requests. Elements following RFC 3261 exactly will misidentify retransmissions of the request as a new, unassociated, request. The correction involves modifying the INVITE transaction state machines. The correction also changes the way responses that cannot be matched to an existing transaction are handled to address a security risk.},
}