@misc{rfc3911,
    series =    {Request for Comments},
    number =    3911,
    howpublished =  {RFC 3911},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC3911},
    url =       {https://www.rfc-editor.org/info/rfc3911},
    author =    {Rohan Mahy and Daniel Petrie},
    title =     {{The Session Initiation Protocol (SIP) "Join" Header}},
    pagetotal = 17,
    year =      2004,
    month =     oct,
    abstract =  {This document defines a new header for use with SIP multi-party applications and call control. The Join header is used to logically join an existing SIP dialog with a new SIP dialog. This primitive can be used to enable a variety of features, for example: "Barge-In", answering-machine-style "Message Screening" and "Call Center Monitoring". Note that definition of these example features is non-normative. {[}STANDARDS-TRACK{]}},
}