%% You should probably cite rfc7639 instead of this I-D.
@techreport{ietf-httpbis-tunnel-protocol-01,
    number =    {draft-ietf-httpbis-tunnel-protocol-01},
    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/01/},
    author =    {Andrew Hutton and Justin Uberti and Martin Thomson},
    title =     {{The Tunnel-Protocol HTTP Request Header Field}},
    pagetotal = 6,
    year =      2015,
    month =     jan,
    day =       20,
    abstract =  {This specification allows HTTP CONNECT requests to indicate what protocol will be used within the tunnel once established, using the Tunnel-Protocol request 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{]}.},
}