@electronic{www.cs.uic.edu,
   title       = {Opinion Mining, Sentiment Analysis, Opinion Extraction}, 
   url         = {http://www.cs.uic.edu/~liub/FBS/sentiment-analysis.html},
   biburl      = {https://puma.uni-kassel.de/url/917ac9f2c9e7ef25ff162667f84d6789/stumme},
   keywords    = {analysis everyaware mining opinion sentiment},
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@electronic{www-faculty.cs.uiuc.edu,
   title       = {Han and Kamber: Data Mining---Concepts and Techniques, 2nd ed., Morgan Kaufmann, 2006}, 
   url         = {http://www-faculty.cs.uiuc.edu/~hanj/bk2/slidesindex.html},
   biburl      = {https://puma.uni-kassel.de/url/7f046d667d25f6f53d413149bb40d258/stumme},
   keywords    = {Data folien book buch kdd mining Mining slides},
   added-at    = {2006-09-14T15:03:16.000+0200},
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