Kania, Nia, Aep Saepudin, and Ferit Gürbüz. “Assessing Cognitive Obstacles in Learning Number Concepts: Insights from Preservice Mathematics Teachers”. JRAMathEdu (Journal of Research and Advances in Mathematics Education) 10, no. 3 (July 31, 2025): 146–166. Accessed November 16, 2025. https://journals2.ums.ac.id/jramathedu/article/view/8638.