Haipeng Wang Lin Shang Xinyu Dai Cunyan Yin Finding Appropriate Turning Point for Text Sentiment Polarity. 754-761 2009 ICONIP (2) http://dx.doi.org/10.1007/978-3-642-10684-2_84 conf/iconip/2009-4 db/conf/iconip/iconip2009-4.html#WangSDY09