Jon Ferraiolo. <a href="http://www.w3.org/TR/2001/REC-SVG-20010904"><cite>Scalable Vector Graphics (SVG) 1.0 Specification.</cite></a> 4 September 2001. W3C Recommendation. URL: <a href="http://www.w3.org/TR/2001/REC-SVG-20010904">http://www.w3.org/TR/2001/REC-SVG-20010904</a>