%% You should probably cite rfc8738 instead of this I-D.
@techreport{ietf-acme-ip-08,
    number =    {draft-ietf-acme-ip-08},
    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-acme-ip/08/},
    author =    {Roland Bracewell Shoemaker},
    title =     {{Automated Certificate Management Environment (ACME) IP Identifier Validation Extension}},
    pagetotal = 5,
    year =      2019,
    month =     oct,
    day =       1,
    abstract =  {This document specifies identifiers and challenges required to enable the Automated Certificate Management Environment (ACME) to issue certificates for IP addresses.},
}