%% You should probably cite rfc3854 instead of this I-D.
@techreport{ietf-smime-x400wrap-09,
    number =    {draft-ietf-smime-x400wrap-09},
    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-x400wrap/09/},
    author =    {Paul E. Hoffman and Chistopher Bonatti and Anders Eggen},
    title =     {{Securing X.400 Content with Secure/Multipurpose Internet Mail Extensions (S/MIME)}},
    pagetotal = 15,
    year =      2003,
    month =     aug,
    day =       15,
    abstract =  {This document describes a protocol for adding cryptographic signature and encryption services to X.400 content with Secure/Multipurpose Internet Mail Extensions (S/MIME). {[}STANDARDS-TRACK{]}},
}