@misc{rfc4244,
    series =    {Request for Comments},
    number =    4244,
    howpublished =  {RFC 4244},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC4244},
    url =       {https://www.rfc-editor.org/info/rfc4244},
    author =    {Mary Barnes},
    title =     {{An Extension to the Session Initiation Protocol (SIP) for Request History Information}},
    pagetotal = 44,
    year =      2005,
    month =     nov,
    abstract =  {This document defines a standard mechanism for capturing the history information associated with a Session Initiation Protocol (SIP) request. This capability enables many enhanced services by providing the information as to how and why a call arrives at a specific application or user. This document defines a new optional SIP header, History-Info, for capturing the history information in requests. {[}STANDARDS-TRACK{]}},
}