C. A. Cadavid Moreno, “Objects of classical algebraic geometry and ringed spaces”, Rev. DyC. EAFIT, vol. 38, no. 128, pp. 43–52, June 2012, Accessed: Nov. 11, 2026. Available: https://publicaciones.eafit.edu.co/index.php/revista-universidad-eafit/article/view/846