@techreport{garcia-sip-visited-network-id-04,
    number =    {draft-garcia-sip-visited-network-id-04},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-garcia-sip-visited-network-id/04/},
    author =    {Miguel Angel García},
    title =     {{Private Session Initiation Protocol (SIP) extension for Visited Network Identifier}},
    pagetotal = 7,
    year =      2002,
    month =     jun,
    day =       5,
    abstract =  {This memo describes a private extension to SIP in the form of a P-Visited-Network-ID header. The contents of the header identify each of the visited networks the message traversed en-route to the home network.},
}