@misc{rfc8823,
    series =    {Request for Comments},
    number =    8823,
    howpublished =  {RFC 8823},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC8823},
    url =       {https://www.rfc-editor.org/info/rfc8823},
    author =    {Alexey Melnikov},
    title =     {{Extensions to Automatic Certificate Management Environment for End-User S/MIME Certificates}},
    pagetotal = 12,
    year =      2021,
    month =     apr,
    abstract =  {This document specifies identifiers and challenges required to enable the Automated Certificate Management Environment (ACME) to issue certificates for use by email users that want to use S/MIME.},
}