Sripanlum, J. ., & Nontapa, N. (2022). The Development of Mathematical Problem-Solving AbilityUsing Discovery Learning for Mathayom Suksa 5 Students. Journal of Education Rajabhat Maha Sarakham University, 19(1), 95–104. Retrieved from https://so06.tci-thaijo.org/index.php/edu-rmu/article/view/256454 (Original work published May 12, 2022)