1. Vinodhini, G., Chandrasekaran, R.: Sentiment analysis and opinion mining: a survey. Int. J. Adv. Res. Comput. Sci. Softw. Eng. 2, 282–292 (2012)
2. Salas-zárate, M.P., Medina-moreira, J., Lagos-ortiz, K., Luna-aveiga, H., Rodríguez-garcía, M.Á., Valencia-garcía, R.: Sentiment analysis on tweets about diabetes: an aspect-level approach. Hindawi Comput. Math. Methods Med. 2017, 9 (2017)
3. Advances in Intelligent Systems and Computing;H Luna-Aveiga,2018
4. Feldman, R.: Techniques and applications for sentiment analysis. Commun. ACM 56, 82 (2013)
5. Mandinach, E.B., Cline, H.F.: Classroom Dynamics: Implementing a Technology-Based Learning Environment. Taylor & Francis, New York (2013)