%% You should probably cite rfc8443 instead of this I-D.
@techreport{ietf-stir-rph-03,
    number =    {draft-ietf-stir-rph-03},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-stir-rph/03/},
    author =    {Ray P. Singh and Martin Dolly and Subir Das and An Nguyen},
    title =     {{PASSporT Extension for Resource-Priority Authorization}},
    pagetotal = 9,
    year =      2018,
    month =     feb,
    day =       1,
    abstract =  {This document extends the Secure Telephone Identity Revisited (STIR) Personal Assertion Token (PASSporT) specification defined in {[}I-D.ietf-stir-passport{]} to allow the inclusion of cryptographically signed assertions of authorization for the values populated in the Session Initiation Protocol (SIP) 'Resource-Priority' header field, which is used for communications resource prioritization.},
}