R. W. A. Rosi, S. M. Susi, I. N. H. Indah, S. P. Sherli, C. M. Cut, and Y. S. Fitri, “Improving Mathematical Problem-Solving Ability through Project-Based Learning in Elementary Linear Algebra: A Study of Mathematics Education Students”, jlils, vol. 5, no. 2, pp. 88–89, Dec. 2025.