%% You should probably cite rfc7127 instead of this I-D.
@techreport{kolkman-proposed-standards-clarified-01,
    number =    {draft-kolkman-proposed-standards-clarified-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-kolkman-proposed-standards-clarified/01/},
    author =    {Olaf Kolkman and Scott O. Bradner and Sean Turner},
    title =     {{Characterization of Proposed Standards}},
    pagetotal = 6,
    year =      2013,
    month =     sep,
    day =       13,
    abstract =  {This document clarifies the description of the review performed on and the maturity level of IETF Proposed Standard RFCs and updates RFC 2026},
}