%% You should probably cite draft-ietf-httpbis-http2-encryption instead of this I-D.
@techreport{nottingham-http2-encryption-03,
    number =    {draft-nottingham-http2-encryption-03},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-nottingham-http2-encryption/03/},
    author =    {Mark Nottingham and Martin Thomson},
    title =     {{Opportunistic Encryption for HTTP URIs}},
    pagetotal = 9,
    year =      2014,
    month =     may,
    day =       19,
    abstract =  {This describes how "http" URIs can be accessed using Transport Layer Security (TLS) to mitigate pervasive monitoring attacks.},
}