Won Yi, Do, Eun Ha Song, Ju Ri Kim, and In Mi So. “Creative Problem Solving According to Problem Types Based on Block Type EPL”. International Journal of Engineering and Technology 7, no. 2.33 (June 8, 2018): 1269–1272. Accessed May 19, 2025. https://mail.sciencepubco.com/index.php/IJET/article/view/18116.