%% You should probably cite draft-ietf-avtcore-srtp-vbr-audio instead of this I-D.
@techreport{perkins-avt-srtp-vbr-audio-05,
    number =    {draft-perkins-avt-srtp-vbr-audio-05},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-perkins-avt-srtp-vbr-audio/05/},
    author =    {Colin Perkins and Jean-Marc Valin},
    title =     {{Guidelines for the use of Variable Bit Rate Audio with Secure RTP}},
    pagetotal = 7,
    year =      2010,
    month =     dec,
    day =       12,
    abstract =  {This memo discusses potential security issues that arise when using variable bit rate audio with the secure RTP profile. Guidelines to mitigate these issues are suggested.},
}