Rocha-Feregrino, Gerardo, and Pilar Alejandra Carrasco Espinoza. “A Binational COIL Matrix-Cryptography Challenge to Teach Invertibility and SDG 4 in Engineering Education”. LACCEI 1, no. 14 (July 27, 2026). Accessed October 3, 2026. https://proceedings.laccei.org/index.php/laccei/article/view/7216.