%% You should probably cite rfc7541 instead of this I-D.
@techreport{ietf-httpbis-header-compression-12,
    number =    {draft-ietf-httpbis-header-compression-12},
    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-httpbis-header-compression/12/},
    author =    {Roberto Peon and Herve Ruellan},
    title =     {{HPACK: Header Compression for HTTP/2}},
    pagetotal = 55,
    year =      2015,
    month =     feb,
    day =       17,
    abstract =  {This specification defines HPACK, a compression format for efficiently representing HTTP header fields, to be used in HTTP/2.},
}