%% You should probably cite rfc8839 instead of this I-D.
@techreport{ietf-mmusic-ice-sip-sdp-15,
    number =    {draft-ietf-mmusic-ice-sip-sdp-15},
    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-ice-sip-sdp/15/},
    author =    {Marc Petit-Huguenin and Ari Keränen and Suhas Nandakumar},
    title =     {{Session Description Protocol (SDP) Offer/Answer procedures for Interactive Connectivity Establishment (ICE)}},
    pagetotal = 43,
    year =      2017,
    month =     nov,
    day =       24,
    abstract =  {This document describes Session Description Protocol (SDP) Offer/ Answer procedures for carrying out Interactive Connectivity Establishment (ICE) between the agents.},
}