[1]
N. Somboon, P. Thongkamsuk, S. Srihamee, and A. Iamsa-ard, “The Development to Problem Solving Ability in Mathematics through the Constructivist Theory with Open Approach of Mathayomsuksa 3 Students”, SDU. Grad. J., vol. 19, no. 3, pp. 1–17, Oct. 2023.