%% You should probably cite draft-ietf-lamps-header-protection-requirements instead of this I-D.
@techreport{melnikov-lamps-header-protection-00,
    number =    {draft-melnikov-lamps-header-protection-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-melnikov-lamps-header-protection/00/},
    author =    {Alexey Melnikov},
    title =     {{Considerations for protecting Email header with S/MIME}},
    pagetotal = 11,
    year =      2018,
    month =     oct,
    day =       18,
    abstract =  {This document describes best practices for handling of Email header protected by S/MIME. Procedures described in this document are also applicable to OpenPGP.},
}