[1] [CITE[PEP - An Extension Mechanism for HTTP]]
([TIME[1999-01-25 02:36:47 +09:00]] 版)
<http://www.w3.org/Protocols/PEP/>

[2] [CITE[PEP - an Extension Mechanism for HTTP]]
( ([TIME[1998-04-07 21:31:46 +09:00]] 版))
<http://www.w3.org/TR/WD-http-pep#_Toc404743958>

[3] [CITE[PEP Issues]]
([TIME[1997-08-11 23:16:01 +09:00]] 版)
<http://www.w3.org/Protocols/PEP/Issues.html>

[4] [CITE[PEP - an Extension Mechanism for HTTP]]
([TIME[1998-04-08 06:31:46 +09:00]] 版)
<http://www.w3.org/TR/WD-http-pep-971121>