Petrakis, Vassileios, Lambrini Seremeti, and Ioannis Kougias. “Conceptual Formation of Curvature in the Logic of Art: An Educational Mathematical Approach”. European Scientific Journal, ESJ 420 (June 16, 2025): 215. Accessed January 11, 2026. https://eujournal.org/index.php/esj/article/view/19640.