Shi Feng Daling Wang Ge Yu Chao Yang Nan Yang Sentiment Clustering: A Novel Method to Explore in the Blogosphere. 332-344 2009 APWeb/WAIM http://dx.doi.org/10.1007/978-3-642-00672-2_30 conf/waim/2009 db/conf/waim/waim2009.html#FengWYYY09