Giacomo Berardi Andrea Esuli Fabrizio Sebastiani Fabrizio Silvestri Blog Distillation via Sentiment-Sensitive Link Analysis. 228-233 2012 NLDB http://dx.doi.org/10.1007/978-3-642-31178-9_26 conf/nldb/2012 db/conf/nldb/nldb2012.html#BerardiESS12