Oledan, A. M., C. D. Ebal Jr., R. E. Perocho, D. J. P. Zabala, M. J. F. Luga, M. R. O. Flores, and G. P. Liwanag. “Teachers’ Perspectives on Implementing Open-Ended Tasks in Mathematics Classrooms”. Asia Research Network Journal of Education, vol. 5, no. 1, Apr. 2025, pp. 25-39, https://so05.tci-thaijo.org/index.php/arnje/article/view/278381.