[1] Web Applications 1.0 r6357 Try to make <a rel=help> more useful. ( ( 版)) <http://html5.org/tools/web-apps-tracker?from=6356&to=6357>
[2] Removing or keeping <link>-ed rel=help as test requirement (issue 1730) (Gérard Talbot著, ) <https://lists.w3.org/Archives/Public/www-style/2017Sep/0004.html>
[3] Remove help cursor from user-agent stylesheet (domenic著, ) <https://github.com/whatwg/html/commit/ea3cde3cba3a255e02bd73ef1036f1d2027c400d>
[4] Remove help cursor from user-agent stylesheet by domenic · Pull Request #3902 · whatwg/html () <https://github.com/whatwg/html/pull/3902>