Nisa’, K., A. Nasrullah, A. Hidayat, I. Mahuda, and I. A. Bhat. “Problem-Based Learning in Improving Problem-Solving Ability and Interest in Learning Mathematics: An Empirical Study”. International Journal of Mathematics and Mathematics Education (IJMME), vol. 1, no. 3, Oct. 2023, pp. 206-17, doi:10.56855/ijmme.v1i3.725.