Bessi, Alessandro and Petroni, Fabio and Del Vicario, Michela and Zollo, Fabiana and Anagnostopoulos, Aris and Scala, Antonio and Caldarelli, Guido and Quattrociocchi, Walter  Viral Misinformation: The Role of Homophily and Polarization.  In: Proceedings of the 24th International Conference on World Wide Web, May 18 - 22, 2015, Florence pp. 355-356.  ISBN 978-1-4503-3473-0.      (2015)