Muramatsu, K. ., E. . Tanaka, K. . Watanuki, and T. . Matsui. “Framework to Describe Constructs of Academic Emotions Using Ontological Descriptions of Statistical Models”. Research and Practice in Technology Enhanced Learning, vol. 11, Jan. 2016, https://rptel.apsce.net/index.php/RPTEL/article/view/2016-11005.