%% You should probably cite rfc3558 instead of this I-D.
@techreport{ietf-avt-evrc-smv-03,
    number =    {draft-ietf-avt-evrc-smv-03},
    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-avt-evrc-smv/03/},
    author =    {Adam H. Li},
    title =     {{RTP Payload Format for Enhanced Variable Rate Codecs (EVRC) and Selectable Mode Vocoders (SMV)}},
    pagetotal = 23,
    year =      2002,
    month =     jun,
    day =       11,
    abstract =  {This document describes the RTP payload format for Enhanced Variable Rate Codec (EVRC) Speech and Selectable Mode Vocoder (SMV) Speech. Two sub-formats are specified for different application scenarios. A bundled/interleaved format is included to reduce the effect of packet loss on speech quality and amortize the overhead of the RTP header over more than one speech frame. A non-bundled format is also supported for conversational applications. {[}STANDARDS-TRACK{]}},
}