%% You should probably cite draft-ietf-httpbis-http2-secondary-certs instead of this I-D.
@techreport{bishop-httpbis-http2-additional-certs-00,
    number =    {draft-bishop-httpbis-http2-additional-certs-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-bishop-httpbis-http2-additional-certs/00/},
    author =    {Mike Bishop},
    title =     {{Secondary Server-Certificate Authentication in HTTP/2}},
    pagetotal = 8,
    year =      2016,
    month =     mar,
    day =       15,
    abstract =  {Many HTTP servers host content from several origins. HTTP/2 {[}RFC7540{]} permits clients to reuse an existing HTTP connection to a server provided that certain conditions are satisfied. One of these conditions is the inclusion of the secondary origin in the certificate provided during the TLS {[}I-D.ietf-tls-tls13{]} handshake. In many cases, origins will wish to maintain separate certificates for different origins but still desire the benefits of a shared HTTP connection. This draft describes how frames which were defined to transfer client certificates might be used to provide additional server certificates as well.},
}