[2] HTML todo list, Dan Connolly, , , https://ksi.cpsc.ucalgary.ca/archives/WWW-TALK/www-talk-1993q1.messages/39.html
60. Proposed Headers element (like a DL; for RFC822 message headers: <HEADERS> <dt>To<dd>connolly@convex.com <dt>Subject<dd>HTML todo list </HEADERS>)
[3] EMail Msg <9301141702.AA00591@www3.cern.ch>, , https://ksi.cpsc.ucalgary.ca/archives/WWW-TALK/www-talk-1993q1.messages/64.html
[1] Another HTML-lint : Notice () http://openlab.ring.gr.jp/k16/htmllint/notice.html#html10