Paolo Bresciani Paolo Giorgini Haralambos Mouratidis Gordon A. Manson Multi-agent Systems and Security Requirements Analysis. 35-48 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2940&spage=35 2003 conf/selmas/2003 SELMAS db/conf/selmas/selmas2003.html#BrescianiGMM03