Vera, R., J. Pulgar, and A. Olguín. “Influence of Commercial Copper Microstructure on the Artificial Green Patina Formation Processes”. Revista de Metalurgia 33, no. 6 (December 30, 1997): 370–375. Accessed April 29, 2024. https://revistademetalurgia.revistas.csic.es/index.php/revistademetalurgia/article/view/831.