Ronald Ashri Sarvapali D. Ramchurn Jordi Sabater Michael Luck Nicholas R. Jennings Trust evaluation through relationship analysis. 1005-1011 2005 conf/atal/2005 AAMAS http://doi.acm.org/10.1145/1082473.1082625 db/conf/atal/aamas2005.html#AshriRSLJ05