Kam-Fai Wong Yunqing Xia Ruifeng Xu Mingli Wu Wenjie Li Pattern-Based Opinion Mining for Stock Market Trend Prediction. 347-361 2008 21 Int. J. Comput. Proc. Oriental Lang. 4 http://dx.doi.org/10.1142/S1793840608001949 db/journals/ijcpol/ijcpol21.html#WongXXWL08