HOGENBOOM, A. ., D. . BAL, F. . FRASINCAR, M. BAL, F. D. . JONG, and U. . KAYMAK. “EXPLOITING EMOTICONS IN POLARITY CLASSIFICATION OF TEXT”. Journal of Web Engineering, vol. 14, no. 1-2, Mar. 2015, pp. 022-40, https://journals.riverpublishers.com/index.php/JWE/article/view/3887.