Norimichi Ukita Real-time cooperative multi-target tracking by dense communication among Active Vision Agents. 15-29 2007 5 Web Intelligence and Agent Systems 1 http://iospress.metapress.com/openurl.asp?genre=article&issn=1570-1263&volume=5&issue=1&spage=15 db/journals/wias/wias5.html#Ukita07