Mulyani, Sri, and Sri Hastuti Noer. “Effectiveness of the STEM Approach in Improving Students’ Mathematical Conceptual Understanding Ability”. Jurnal Absis: Jurnal Pendidikan Matematika Dan Matematika, vol. 8, no. 2, Aug. 2025, pp. 461-72, doi:10.30606/absis.v8i2.3271.