Pratiwi, E. ., T. . Nusantara, S. . Susiswo, M. . Muksar, and S. . Subanji. “Characteristics of Students’ Cognitive Conflict in Solving a Problem Based on Information Processing Theory”. International Journal of Learning, Teaching and Educational Research, vol. 18, no. 2, Feb. 2019, pp. 76-88, http://ijlter.myres.net/index.php/ijlter/article/view/596.