%% You should probably cite rfc2392 instead of this I-D.
@techreport{ietf-mhtml-cid-v2-00,
    number =    {draft-ietf-mhtml-cid-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-cid-v2/00/},
    author =    {Dr. Ed Levinson},
    title =     {{Content-ID and Message-ID Uniform Resource Locators}},
    pagetotal = 6,
    year =      1998,
    month =     may,
    day =       8,
    abstract =  {The Uniform Resource Locator (URL) schemes, "cid:" and "mid:" allow references to messages and the body parts of messages. For example, within a single multipart message, one HTML body part might include embedded references to other parts of the same message. {[}STANDARDS-TRACK{]}},
}