1. Elabnody, M., Fouad, M., Maghraby, F., Hegazy, A.: Framework for gamification based E-learning systems for higher education in Egypt. Int. J. Intell. Comput. Inf. Sci. IJICIS 17(4), 59 (2017)
2. Raut, S., Mune, A.: Review paper on sentiments analyzer by using a supervised joint topic modeling approach. IJESC 8(1) (2018)
3. Vinodhini, G., Chandrasekaran, R.: Sentiment analysis and opinion mining: a survey. Int. J. Adv. Res. Comput. Sci. Softw. Eng. 2, 282–292 (2012)
4. Liu, B.: Sentiment analysis and opinion mining. In: Synthesis Lectures on Human Language Technologies, vol. 5, no. 1, pp. 1–167 (2012)
5. Yang, B., Cardie, C.: Context-aware learning for sentence-level sentiment analysis with posterior regularization. In: Proceedings of the 52nd Annual Meeting of the Association for Computational Linguistics, ACL 2014, 22–27 June 2014, Baltimore, MD, USA, vol. 1, Long Papers, pp. 325–335 (2014)