%% You should probably cite draft-ietf-lamps-hash-of-root-key-cert-extn instead of this I-D.
@techreport{housley-hash-of-root-key-cert-extn-00,
    number =    {draft-housley-hash-of-root-key-cert-extn-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-housley-hash-of-root-key-cert-extn/00/},
    author =    {Russ Housley},
    title =     {{Hash Of Root Key Certificate Extension}},
    pagetotal = 7,
    year =      2018,
    month =     mar,
    day =       2,
    abstract =  {This document specifies a certificate extension that is carried in the self-signed certificate for a trust anchor, which is often called a Root Certification Authority (CA) certificate, to identify the next public key that will be used by the trust anchor.},
}