%% You should probably cite rfc4613 instead of this I-D.
@techreport{westerlund-mime-dls-01,
    number =    {draft-westerlund-mime-dls-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-westerlund-mime-dls/01/},
    author =    {Per Frojdh and Magnus Westerlund and Ulf A. Lindgren},
    title =     {{Media Type Registrations for Downloadable Sounds for Musical Instrument Digital Interface (MIDI)}},
    pagetotal = 6,
    year =      2006,
    month =     feb,
    day =       14,
    abstract =  {This document serves to register a media type for Downloadable Sounds. This memo provides information for the Internet community.},
}