?url_ver=Z39.88-2004&rft_id=10.1145%2F2911451.2914716&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Coletto%2C+Mauro&rft.aufirst=Mauro&rft.aulast=Coletto&rft.isbn=978-1-4503-4069-4&rft.date=2016&rft.title=Polarized+User+and+Topic+Tracking+in+Twitter&rft.btitle=Proceedings+of+the+39th+International+ACM+SIGIR+conference+on+Research+and+Development+in+Information+Retrieval&rft.genre=proceeding