[1] [CITE@en[Beacon]]
( ([TIME[2013-05-07 00:00:42 +09:00]] 版))
<https://dvcs.w3.org/hg/webperf/raw-file/tip/specs/Beacon/Overview.html>

[2] [CITE@en[Beacon]]
( ([TIME[2013-06-22 12:29:14 +09:00]] 版))
<https://dvcs.w3.org/hg/webperf/raw-file/tip/specs/Beacon/Overview.html>

[3] [CITE@en[Beacon]]
( ([TIME[2013-10-26 06:14:43 +09:00]] 版))
<http://www.w3.org/TR/2013/WD-beacon-20131029/>