Asmus Freytag. <a href="http://www.unicode.org/unicode/reports/tr14/tr14-17.html"><cite>Line Breaking Properties.</cite></a> 29 March 2005. Unicode Standard Annex #14. URL: <a href="http://www.unicode.org/unicode/reports/tr14/tr14-17.html">http://www.unicode.org/unicode/reports/tr14/tr14-17.html</a>