%% You should probably cite rfc2423 instead of this I-D.
@techreport{ema-vpim-vmsg-02,
    number =    {draft-ema-vpim-vmsg-02},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ema-vpim-vmsg/02/},
    author =    {Glenn Parsons and Gregory Vaudreuil},
    title =     {{VPIM Voice Message MIME Sub-type Registration}},
    pagetotal = 6,
    year =      1998,
    month =     apr,
    day =       27,
    abstract =  {This document describes the registration of the MIME sub-type multipart/voice-message for use with the Voice Profile for Internet Mail (VPIM). {[}STANDARDS-TRACK{]}},
}