Paolo Bresciani Paolo Donzelli The Agent at the Center of the Requirements Engineering Process: A Framework for Complex Socio-technical Systems. 1-18 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2940&spage=1 2003 conf/selmas/2003 SELMAS db/conf/selmas/selmas2003.html#BrescianiD03