Sabine Payr The Virtual University's Faculty: An Overview of Educational Agents. 1-19 2003 17 Applied Artificial Intelligence 1 http://taylorandfrancis.metapress.com/openurl.asp?genre=article&issn=0883-9514&volume=17&issue=1&spage=1 db/journals/aai/aai17.html#Payr03