%% You should probably cite rfc6366 instead of this I-D.
@techreport{ietf-codec-requirements-05,
    number =    {draft-ietf-codec-requirements-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-ietf-codec-requirements/05/},
    author =    {Jean-Marc Valin and Koen Vos},
    title =     {{Requirements for an Internet Audio Codec}},
    pagetotal = 17,
    year =      2011,
    month =     jul,
    day =       27,
    abstract =  {This document provides specific requirements for an Internet audio codec. These requirements address quality, sampling rate, bit-rate, and packet-loss robustness, as well as other desirable properties. This document is not an Internet Standards Track specification; it is published for informational purposes.},
}