Cirrincione, R., and R. Cristofolini. “Italian Contributions to the Birth of Petrography”. Bullettin of the Gioenia Academy of Natural Sciences of Catania 50, no. 380 (May 5, 2017): FP392-FP406. Accessed May 18, 2024. https://bollettino.gioenia.it/index.php/gioenia/article/view/11.