%% You should probably cite rfc7160 instead of this I-D.
@techreport{ietf-avtext-multiple-clock-rates-11,
    number =    {draft-ietf-avtext-multiple-clock-rates-11},
    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-avtext-multiple-clock-rates/11/},
    author =    {Marc Petit-Huguenin and Glen Zorn},
    title =     {{Support for Multiple Clock Rates in an RTP Session}},
    pagetotal = 13,
    year =      2013,
    month =     nov,
    day =       23,
    abstract =  {This document clarifies the RTP specification regarding the use of different clock rates in an RTP session. It also provides guidance on how legacy RTP implementations that use multiple clock rates can interoperate with RTP implementations that use the algorithm described in this document. It updates RFC 3550.},
}