[1] [CITE[UCUM]]
( ([TIME[2014-05-21 13:54:15 +09:00]] 版))
<http://unitsofmeasure.org/trac/>

[2] [CITE[The Unified Code for Units of Measure]]
( ([TIME[2013-10-22 04:24:45 +09:00]] 版))
<http://unitsofmeasure.org/ucum.html>