%% You should probably cite rfc5750 instead of this I-D.
@techreport{ietf-smime-3850bis-11,
    number =    {draft-ietf-smime-3850bis-11},
    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-smime-3850bis/11/},
    author =    {Sean Turner and Blake C. Ramsdell},
    title =     {{Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.2 Certificate Handling}},
    pagetotal = 21,
    year =      2009,
    month =     may,
    day =       14,
    abstract =  {This document specifies conventions for X.509 certificate usage by Secure/Multipurpose Internet Mail Extensions (S/MIME) v3.2 agents. S/MIME provides a method to send and receive secure MIME messages, and certificates are an integral part of S/MIME agent processing. S/MIME agents validate certificates as described in RFC 5280, the Internet X.509 Public Key Infrastructure Certificate and CRL Profile. S/MIME agents must meet the certificate processing requirements in this document as well as those in RFC 5280. This document obsoletes RFC 3850. {[}STANDARDS-TRACK{]}},
}