Xuejun Yang Xiangli Qu Chunmei Gui Towards Reliable Rating Filtering in Grid Reputation Systems: A Pre-Evaluating Set Based Bias-Tuned Approach1. 129-136 2006 conf/dasc/2006 DASC http://doi.ieeecomputersociety.org/10.1109/DASC.2006.48 db/conf/dasc/dasc2006.html#YangQG06