%% You should probably cite draft-iab-rfc-css instead of this I-D.
@techreport{flanagan-rfc-css-04,
    number =    {draft-flanagan-rfc-css-04},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-flanagan-rfc-css/04/},
    author =    {Heather Flanagan},
    title =     {{CSS Requirements for RFCs}},
    pagetotal = 14,
    year =      2015,
    month =     sep,
    day =       3,
    abstract =  {The HTML format for RFCs, described in {[}I-D.hildebrand-html-rfc{]} assigns style guidance to an RFC Editor-defined Cascading Style Sheet (CSS). The embedded, default CSS as included by the RFC Editor is expected to take into account accessibility needs and be built along a responsive design model. This document describes the requirements for the default CSS used by the RFC Editor. The class names are based on the classes defined in draft-hildebrand-html-rfc. Discussion of this draft takes place on the rfc-interest mailing list (rfc-interest@rfc-editor.org), which has its home page at https://www.rfc-editor.org/mailman/listinfo/rfc-interest.},
}