B. M. G. Siahaan, E. M. Tamba, M. E. Simbolon, T. N. Enjelika, and I. Simangunsong, “The Impact of the Problem-Based Learning Model with an Open-Ended Approach on the Creative Thinking Skills of 10th Grade Students in Quadratic Function Education”, Journal of Education and Learning Evaluation, vol. 2, no. 1, pp. 149–158, Jun. 2025.