Your Friends Mention It. What About Visiting It?: A Mobile Social-Based Sightseeing Application. - Tiziana Catarci; Francesco Leotta; Andrea Marrella; Massimo Mecella; Daniele Sora; Pietro Cottone; Giuseppe Lo Re; Marco Morana; Marco Ortolani; Vincenzo Agate; Giovanni Renato Meschino; Giovanni Pecoraro; et al. (AVI, 2016)