Yamashita, K. ., R. . Fujioka, S. . Kogure, Y. . Noguchi, T. . Konishi, and Y. . Itoh. “Practices of Algorithm Education Based on Discovery Learning Using a Program Visualization System”. Research and Practice in Technology Enhanced Learning, vol. 11, Aug. 2016, https://rptel.apsce.net/index.php/RPTEL/article/view/2016-11015.