[1] [CITE@EN[XPath and XQuery Functions and Operators 3.1]] ([TIME[2017-03-21 16:02:06 +09:00]]) <https://www.w3.org/TR/2017/REC-xpath-functions-31-20170321/#random-numbers>

[3] [CITE[ランダム文字列キー作るときによくつかうあれ - Qiita]] ([TIME[2017-11-25 13:24:37 +09:00]]) <https://qiita.com/wakaba@github/items/0282c5ffee86dd05ae99>

[2] [CITE@ja[雑にパスワードを生成する | tech - 氾濫原]]
([TIME[2017-11-24 10:26:02 +09:00]])
<https://lowreal.net/2017/11/24/1>