Fang Fang Ye Xin A Hybrid Case-Based Approach for Retrieving User's Preference and Strategy in Buyer-Seller Negotiation. 286-291 2008 ISIP http://doi.ieeecomputersociety.org/10.1109/ISIP.2008.73 conf/isip/2008 db/conf/isip/isip2008.html#FangX08