M. M. L. Siahaan, C. N. Salsinha, and F. Fitriani, “Learning Trajectory: Learning Design Based on Rigorous Mathematical Thinking to Enhance Students’ Mathematical Conceptual”, Universitas Jambi, vol. 16, no. 2, pp. 339–359, Aug. 2026, doi: 10.22437/edumatica.v16i2.49776.