* [http://www.ietf.org/rfc/rfc2187.txt Application of Internet Cache Protocol (ICP)]
* [http://tools.ietf.org/html/rfc2616 HTTP/1.1]
* [http://www.chromium.org/spdy/spdy-whitepaper SPDY]
* [http://tools.ietf.org/html/draft-ietf-httpbis-http2-13 HTTP/2]
* [http://tools.ietf.org/id/draft-agl-tls-nextprotoneg-00.txt Transport Layer Security (TLS) Next Protocol Negotiation Extension (NPN)]