Kosasih, Usep. “Project-Based Learning in Analytical Geometry: Problem-Solving and Representational Reasoning”. Pasundan Journal of Mathematics Education : Jurnal Pendidikan Matematika, vol. 16, no. 1, May 2026, pp. 25-39, https://journal.unpas.ac.id/index.php/pjme/article/view/41199.