%% You should probably cite rfc2387 instead of this I-D.
@techreport{ietf-mhtml-rel-v2-00,
    number =    {draft-ietf-mhtml-rel-v2-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-mhtml-rel-v2/00/},
    author =    {Dr. Ed Levinson},
    title =     {{The MIME Multipart/Related Content-type}},
    pagetotal = 10,
    year =      1998,
    month =     apr,
    day =       10,
    abstract =  {This document defines the Multipart/Related content-type and provides examples of its use. {[}STANDARDS-TRACK{]}},
}