Saputra, H., Maimunah and Yuanita, P. (2024) “Development of Learning Instruments Based on The Problem Based Learning Model to Facilitate Students’ Mathematical Problem Solving Skill on Curved 3D Shapes”, Jurnal Absis: Jurnal Pendidikan Matematika dan Matematika, 6(2), pp. 1006–1021. doi: 10.30606/absis.v6i2.2381.