%% You should probably cite draft-abhishek-mmusic-superimposition-grouping instead of this I-D.
@techreport{abhishek-mmusic-overlay-grouping-00,
    number =    {draft-abhishek-mmusic-overlay-grouping-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-abhishek-mmusic-overlay-grouping/00/},
    author =    {Rohit Abhishek},
    title =     {{SDP Overlay Grouping framework for immersive telepresence media streams}},
    pagetotal = 8,
    year =      2020,
    month =     oct,
    day =       27,
    abstract =  {This document defines semantics that allow for signalling a new SDP group "OL" for overlays in an immersive telepresence session. The "OL" attribute can be used by the application to relate all the overlay media streams enabling them to be added as overlay on top of the immersive video. The overlay grouping semantics is required, if the media data is seperate and transported via different protocols.},
}