Paola Rizzo Manuela M. Veloso Maria Miceli Amedeo Cesta Goal-Based Personalities and Social Behaviors in Believable Agents. 239-271 1999 13 Applied Artificial Intelligence 3 http://taylorandfrancis.metapress.com/openurl.asp?genre=article&issn=0883-9514&volume=13&issue=3&spage=239 db/journals/aai/aai13.html#Rizzo99