Mark Davis. <a href="http://www.unicode.org/reports/tr21/tr21-5.html"><cite>Case Mappings.</cite></a> 26 March 2001. Unicode Standard Annex #21. URL: <a href="http://www.unicode.org/reports/tr21/tr21-5.html">http://www.unicode.org/reports/tr21/tr21-5.html</a>