%% You should probably cite rfc7639 instead of this I-D.
@techreport{ietf-httpbis-tunnel-protocol-03,
    number =    {draft-ietf-httpbis-tunnel-protocol-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-ietf-httpbis-tunnel-protocol/03/},
    author =    {Andrew Hutton and Justin Uberti and Martin Thomson},
    title =     {{The ALPN HTTP Header Field}},
    pagetotal = 6,
    year =      2015,
    month =     apr,
    day =       19,
    abstract =  {This specification allows HTTP CONNECT requests to indicate what protocol will be used within the tunnel once established, using the ALPN header field. Editorial Note (To be removed by RFC Editor) Discussion of this draft takes place on the HTTPBIS working group mailing list (ietf-http-wg@w3.org), which is archived at {[}1{]}. Working Group information can be found at {[}2{]} and {[}3{]}; source code and issues list for this draft can be found at {[}4{]}.},
}