Putri Harahap, Rika Aulia, and Eka Hasibuan. “Analisis Kemampuan Berpikir Kritis Matematis Siswa Kelas VIII SMP Melalui Pendekatan Open- Ended Pada Materi Sistem Persamaan Linear Dua Variabel”. Jurnal Cendekia : Jurnal Pendidikan Matematika 7, no. 1 (March 30, 2023): 874-888. Accessed January 24, 2026. https://www.j-cup.org/index.php/cendekia/article/view/2167.