%% You should probably cite rfc7410 instead of this I-D.
@techreport{ietf-appsawg-authres-ptypes-registry-00,
    number =    {draft-ietf-appsawg-authres-ptypes-registry-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-ietf-appsawg-authres-ptypes-registry/00/},
    author =    {Murray Kucherawy},
    title =     {{A Property Types Registry for the Authentication-Results Header Field}},
    pagetotal = 5,
    year =      2014,
    month =     aug,
    day =       11,
    abstract =  {{[}RFC7001{]} describes a header field called Authentication-Results for use with electronic mail messages to indicate the results of message authentication efforts. Any receiver-side software, such as mail filters or Mail User Agents (MUAs), can add or use this header field to relay that information in a convenient and meaningful way to users, or make sorting and filtering decisions. One portion of the definition in that document limits the types of authentication properties about a message to a small, fixed set. This document updates the specification to allow new property types to be declared and used.},
}