Philippe Le H&#233;garet; et al. <a href="http://www.w3.org/TR/2001/NOTE-CX-20011211"><cite>Component Extension (CX) API requirements Version 1.0.</cite></a> 11 December 2001. W3C Note. URL: <a href="http://www.w3.org/TR/2001/NOTE-CX-20011211">http://www.w3.org/TR/2001/NOTE-CX-20011211</a>