Pei Pei Kuan Shanika Karunasekera Leon Sterling Improving Goal and Role Oriented Analysis for Agent Based Systems. 40-47 2005 conf/aswec/2005 Australian Software Engineering Conference http://csdl.computer.org/comp/proceedings/aswec/2005/2257/00/22570040abs.htm db/conf/aswec/aswec2005.html#KuanRS05