作者：Satoru Takahashi, Masakazu Takahashi, Hiroshi Takahashi and Kazuhiko Tsuda
题目：Analysis of the Relation Between Stock Price Returns and Headline News Using Text Categorization
                         出处：Knowledge-Based Intelligent Information andEngineering Systems   Volume 4693/2010    2010, 1339-1345.
链接：http://www.springerlink.com/content/1t117334135566l5/