%% You should probably cite rfc9444 instead of this I-D.
@techreport{ietf-acme-subdomains-07,
    number =    {draft-ietf-acme-subdomains-07},
    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-subdomains/07/},
    author =    {Owen Friel and Richard Barnes and Tim Hollebeek and Michael Richardson},
    title =     {{Automated Certificate Management Environment (ACME) for Subdomains}},
    pagetotal = 20,
    year =      2023,
    month =     mar,
    day =       1,
    abstract =  {This document specifies how Automated Certificate Management Environment (ACME) can be used by a client to obtain a certificate for a subdomain identifier from a certification authority. Additionally, this document specifies how a client can fulfill a challenge against an ancestor domain but may not need to fulfill a challenge against the explicit subdomain if certification authority policy allows issuance of the subdomain certificate without explicit subdomain ownership proof.},
}