R. Lugo-Primelles, “The epithermal-porphyritic system of Au-Cu San Nicolás - El Pilar - Gaspar, Ciego de Ávila, Cuba”, Geoinformativa, vol. 17, p. https://cu-id.com/2277/v17e04, Feb. 2024, Accessed: Oct. 23, 2026. [Online]. Available: https://www.rgi.edicionescervantes.com/index.php/rgi/article/view/135