[1] [CITE@en[draft-nottingham-linked-cache-inv-01 - Linked Cache Invalidation]]
( ([TIME[2012-02-25 23:17:44 +09:00]] 版))
<http://tools.ietf.org/html/draft-nottingham-linked-cache-inv-01#section-5>

[2] [CITE@en[draft-nottingham-linked-cache-inv-00 - Linked Cache Invalidation]]
( ([TIME[2014-07-27 04:12:55 +09:00]] 版))
<http://tools.ietf.org/html/draft-nottingham-linked-cache-inv-00.html#section-5>