Xiaohui Zhao Chengfei Liu Yun Yang Web Service Based Architecture for Workflow Management Systems. 34-43 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3180&spage=34 2004 conf/dexa/2004 DEXA db/conf/dexa/dexa2004.html#ZhaoLY04