Shan Wang Jun Zhang Zhaohui Peng Jiang Zhan Qiuyue Wang Study on Efficiency and Effectiveness of KSORD. 6-17 2007 conf/waim/2007 APWeb/WAIM http://dx.doi.org/10.1007/978-3-540-72524-4_5 db/conf/waim/waim2007.html#WangZPZW07