Pratama, D.; Prihandhika, A.; Zulkarnaen, R.; Nurlatifah, N.; Hoeriyah, P.; Mauludani, S. Spatial-Algebraic Cognitive Barriers in Solving Ellipse and Hyperbola Problems: An Analysis Using Polya’s Heuristics and Cognitive Load Theory. J.Math.Instr.Soc.Res.Opin. 2026, 5, 2451–2468.