%% You should probably cite rfc8122 instead of this I-D.
@techreport{ietf-mmusic-4572-update-00,
    number =    {draft-ietf-mmusic-4572-update-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-mmusic-4572-update/00/},
    author =    {Christer Holmberg},
    title =     {{Updates to RFC 4572}},
    pagetotal = 5,
    year =      2016,
    month =     may,
    day =       4,
    abstract =  {This document updates RFC 4572 by clarifying the usage of multiple SDP 'fingerprint' attributes with a single TLS connection. The document also updates the preferred cipher suite to be used, and removes the requirement to use the same hash function for calculating the certificate fingerprint that is used to calculate the certificate signature.},
}