Nong Xiao Yingjie Zhao Wei Fu 1045-1048 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3399&spage=1045 2005 conf/apweb/2005 APWeb db/conf/apweb/apweb2005.html#XiaoZF05