%% You should probably cite draft-ietf-anima-jws-voucher instead of this I-D.
@techreport{richardson-anima-jose-voucher-00,
    number =    {draft-richardson-anima-jose-voucher-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-richardson-anima-jose-voucher/00/},
    author =    {Michael Richardson and Thomas Werner},
    title =     {{JOSE signed Voucher Artifacts for Bootstrapping Protocols}},
    pagetotal = 15,
    year =      2020,
    month =     dec,
    day =       22,
    abstract =  {This document describes a serialiation of the RFC8366 voucher format to a JSON format is then signed using the JSON Object Signing and Encryption mechanism described in RFC7515. In addition to explaining how the format is created, MIME types are registered and examples are provided.},
}