Abd Rasid, Norshakila, et al. “Tangible Calculus: An Exploratory Study of the Effectiveness and Student Acceptance of the AreaGO for Learning Area Under a Curve”. Jurnal Pendidikan Sains Dan Matematik Malaysia, vol. 16, no. 1, June 2026, pp. 131-4, https://doi.org/10.37134/jpsmm.vol16.1.10.2026.