Norman Walsh. <a href="http://www.w3.org/TR/2001/NOTE-xml-link-style-20010605"><cite>XML Linking and Style.</cite></a> 5 June 2001. W3C Note. URL: <a href="http://www.w3.org/TR/2001/NOTE-xml-link-style-20010605">http://www.w3.org/TR/2001/NOTE-xml-link-style-20010605</a>