@misc{rfc5368,
    series =    {Request for Comments},
    number =    5368,
    howpublished =  {RFC 5368},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC5368},
    url =       {https://www.rfc-editor.org/info/rfc5368},
    author =    {Markus Isomaki and Gonzalo Camarillo and Hisham Khartabil and Aki Niemi and Miguel Angel García},
    title =     {{Referring to Multiple Resources in the Session Initiation Protocol (SIP)}},
    pagetotal = 13,
    year =      2008,
    month =     oct,
    abstract =  {This document defines extensions to the SIP REFER method so that it can be used to refer to multiple resources in a single request. These extensions include the use of pointers to Uniform Resource Identifier (URI) lists in the Refer-To header field and the "multiple-refer" SIP option-tag. {[}STANDARDS-TRACK{]}},
}