Steffen Staab Bharat K. Bhargava Leszek Lilien Arnon Rosenthal Marianne Winslett Morris Sloman Tharam S. Dillon Elizabeth Chang Farookh Khadeer Hussain Wolfgang Nejdl Daniel Olmedilla Vipul Kashyap The Pudding of Trust. 74-88 2004 19 IEEE Intelligent Systems 5 http://doi.ieeecomputersociety.org/10.1109/MIS.2004.52 db/journals/expert/expert19.html#StaabBLRWSDCHNOK04