Marande, Gavrilla Mei Sela, and Hafsah Adha Diana. “Design Research: Development of Learning Trajectories in Realistic Mathematics Education on Relation and Function Materials”. Indo-MathEdu Intellectuals Journal 4, no. 1 (April 30, 2023): 10–28. Accessed May 11, 2025. https://ejournal.indo-intellectual.id/index.php/imeij/article/view/50.