PERMCHEEWA, J.; COJORN , K. Developing of Mathematical Process for Solving Problem according to the PISA framework with Problem based Learning Activity for Mathayomsuksa 4 Students. Journal of Roi Et Rajabhat University, [S. l.], v. 18, n. 2, p. 197–212, 2024. Disponível em: https://so03.tci-thaijo.org/index.php/reru/article/view/275224. Acesso em: 27 aug. 2026.