Madalina Croitoru Srinandan Dasmahapatra Paul H. Lewis Incorporating Probabilistic Knowledge in HealthAgents: a Conceptual Graph Approach. 33-40 2008 ICCS Supplement http://ceur-ws.org/Vol-354/p22.pdf conf/iccs/2008s db/conf/iccs/iccss2008.html#CroitoruDL08