Aguilar-Reyes, Bertha Oliva, Mikhail Ostrooumov, and Emmanuel Fritsch. “Mineralogic Study of the Destabilization of Mexican Opals”. Revista Mexicana de Ciencias Geológicas 22, no. 3 (April 24, 2018): 391–400. Accessed May 20, 2025. https://rmcg.unam.mx/index.php/rmcg/article/view/846.