[1] [CITE@en[draft-nottingham-surrogates-00 - Requirements for Demand-Driven Surrogate Origin Servers]]
( ([TIME[2012-01-11 11:15:30 +09:00]] 版))
<http://tools.ietf.org/html/draft-nottingham-surrogates-00#section-3.6>

[2] [CITE@en[Edge Architecture Specification 1.0]]
( ([TIME[2001-08-03 20:28:16 +09:00]] 版))
<http://www.w3.org/TR/2001/NOTE-edge-arch-20010804>

[8] [[RFC 4229]] が [[IANA登録簿]]に状態「[[情報提供]]」で >>2 を出典に登録しています [SRC[>>7]]。

[REFS[
- [7] [CITE@en[RFC 4229 - HTTP Header Field Registrations]] ([TIME[2014-11-02 18:53:20 +09:00]] 版) <http://tools.ietf.org/html/rfc4229#section-2.1.101>
]REFS]