%% You should probably cite draft-ietf-mmusic-dtls-sdp instead of this I-D.
@techreport{holmberg-mmusic-sdp-dtls-01,
    number =    {draft-holmberg-mmusic-sdp-dtls-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-holmberg-mmusic-sdp-dtls/01/},
    author =    {Christer Holmberg and Roman Shpount},
    title =     {{Using the SDP Offer/Answer Mechanism for DTLS}},
    pagetotal = 8,
    year =      2015,
    month =     jun,
    day =       20,
    abstract =  {This draft defines the SDP offer/answer procedures for negotiating and establishing a DTLS association. The draft also defines the criteria for when a new DTLS association must be established.},
}