W3C Recommendation
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... Published specification:
The text/html media type is now defined by W3C Recommendations;
the latest published version is [HTML401 ...
... Raggett, D., et al., "HTML 4.0 Specification", W3C Recommendation, December 1997. Available at <http://www.w3.org/TR/1998/REC-html40- 19980424> ...
... Raggett, D., et al., "HTML 4.01 Specification", W3C Recommendation, December 1999. Available at <http://www.w3.org/TR/html401>. ...
... Markup Language: A Reformulation of HTML 4 in XML 1.0", W3C Recommendation, January 2000. Available at <http://www.w3.org/TR/xhtml1>. ...