@misc{rfc5627,
    series =    {Request for Comments},
    number =    5627,
    howpublished =  {RFC 5627},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC5627},
    url =       {https://www.rfc-editor.org/info/rfc5627},
    author =    {Jonathan Rosenberg},
    title =     {{Obtaining and Using Globally Routable User Agent URIs (GRUUs) in the Session Initiation Protocol (SIP)}},
    pagetotal = 40,
    year =      2009,
    month =     oct,
    abstract =  {Several applications of the Session Initiation Protocol (SIP) require a user agent (UA) to construct and distribute a URI that can be used by anyone on the Internet to route a call to that specific UA instance. A URI that routes to a specific UA instance is called a Globally Routable UA URI (GRUU). This document describes an extension to SIP for obtaining a GRUU from a registrar and for communicating a GRUU to a peer within a dialog. {[}STANDARDS-TRACK{]}},
}