Albert Bifet Geoffrey Holmes Bernhard Pfahringer Ricard Gavaldà Detecting Sentiment Change in Twitter Streaming Data. 5-11 2011 17 Journal of Machine Learning Research - Proceedings Track http://jmlr.csail.mit.edu/proceedings/papers/v17/bifet11a/bifet11a.pdf db/journals/jmlr/jmlrp17.html#BifetHPG11