Meika, Ika, Nenden Suciyati Sartika, and Asep Sujana. “Analyzing Learning Obstacles in Differential Calculus: A Case Study of Pre-Service Mathematics Teachers in Indonesian Regional University”. Mosharafa: Jurnal Pendidikan Matematika 14, no. 3 (July 30, 2025): 885–902. Accessed April 30, 2026. https://journal.institutpendidikan.ac.id/index.php/mosharafa/article/view/2234.