Afagani Dahlan, J., S. S. Al Ghifary, and E. Supriyadi. “A meta-analysis study: Does the open-ended approach to learning mathematics have an effect on students’ high-level mathematical thinking abilities?”. Kasetsart Journal of Social Sciences, vol. 47, no. 3, Sept. 2026, p. 470316, https://so04.tci-thaijo.org/index.php/kjss/article/view/292613.