INVENTADO, P. S., R. LEGASPI, M. SUAREZ, and M. NUMAO. “PREDICTING STUDENT EMOTIONS RESULTING FROM APPRAISAL OF ITS FEEDBACK”. Research and Practice in Technology Enhanced Learning, vol. 6, no. 2, July 2011, pp. 107-33, https://rptel.apsce.net/index.php/RPTEL/article/view/2011-06007.