HASEGAWA, S., and A. KASHIHARA. “A MINING TECHNIQUE FOR EXTRACTION OF PRESENTATION SCHEMA FROM PRESENTATION DOCUMENTS ACCUMULATED IN LABORATORY”. Research and Practice in Technology Enhanced Learning, vol. 8, no. 1, Aug. 2022, pp. 153-69, https://rptel.apsce.net/index.php/RPTEL/article/view/2013-08010.