A. Purwa Kusuma, M. Tri Maria Ulfah, N. Kurniasari Rahmawati, A. Arifannisa, and A. Nurrahmah, “Model Problem Based Learning terhadap Kemampuan Pemahaman Konsep Matematis Siswa”, JPTPM, vol. 3, no. 2, pp. 63–74, Oct. 2026.