Tantek &#199;elik. <a href="http://www.w3.org/TR/2004/CR-css3-ui-20040511"><cite>CSS3 Basic User Interface Module.</cite></a> 11 May 2004. W3C Candidate Recommendation. (Work in progress.) URL: <a href="http://www.w3.org/TR/2004/CR-css3-ui-20040511">http://www.w3.org/TR/2004/CR-css3-ui-20040511</a>