Anne van Kesteren. <a href="http://www.w3.org/TR/2008/WD-access-control-20080912"><cite>Access Control for Cross-Site Requests.</cite></a> 12 September 2008. W3C Working Draft. (Work in progress.) URL: <a href="http://www.w3.org/TR/2008/WD-access-control-20080912">http://www.w3.org/TR/2008/WD-access-control-20080912</a>