Khotimah, K., Lestari, I., Agus, R. N., Oktaviyanthi, R., Putri, S. P., & Ünver, S. K. (2026). Improving university students’ geometrical understanding of derivatives through graphic visualization. Jurnal Elemen, 12(1), 263–276. https://doi.org/10.29408/jel.v12i1.33325