Anastasia Giachanou, Ida Mele, Fabio Crestani. Explaining Sentiment Spikes in Twitter. In Snehasis Mukhopadhyay, ChengXiang Zhai, Elisa Bertino, Fabio Crestani, Javed Mostafa, Jie Tang, Luo Si, Xiaofang Zhou, Yi Chang, Yunyao Li, Parikshit Sondhi, editors, Proceedings of the 25th ACM International on Conference on Information and Knowledge Management, CIKM 2016, Indianapolis, IN, USA, October 24-28, 2016. pages 2263-2268, ACM, 2016. [doi]