Wahyuni, N., N. Izzati, and M. Liana. “Improving Students’ Understanding of Mathematical Concepts Through the Flipped Classroom Learning Model for Class VIII SMP”. Edumatica : Jurnal Pendidikan Matematika, vol. 13, no. 2, Aug. 2023, pp. 126-35, doi:10.22437/edumatica.v13i02.26445.