Antonio Congiusta Andrea Pugliese Domenico Talia Paolo Trunfio Designing Grid services for distributed knowledge discovery. 91-104 2003 1 Web Intelligence and Agent Systems 2 http://iospress.metapress.com/openurl.asp?genre=article&issn=1570-1263&volume=1&issue=2&spage=91 db/journals/wias/wias1.html#CongiustaPTT03