Jian Zhou Yong Yu Lei Zhang Chenxi Lin Yin Yang Integrating Web Services into Ontology-Based Web Portal. 585-596 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3399&spage=585 2005 conf/apweb/2005 APWeb db/conf/apweb/apweb2005.html#ZhouYZLY05