Tadeusz Lasota Zbigniew Telec Bogdan Trawinski Krzysztof Trawinski Concept of a Multi-Agent System for Assisting in Real Estate Appraisals. 50-59 2009 KES-AMSTA http://dx.doi.org/10.1007/978-3-642-01665-3_6 conf/kesamsta/2009 db/conf/kesamsta/kesamsta2009.html#LasotaTTT09