Pérez-Rodríguez, Yunier. 2011. «Evaluation of Zeolitized and Vitreous Tuffs Located in the Province of Holguín for Use As a Natural Pozzolan in Construction». Ciencia & Futuro 1 (4):52-62. https://revista.ismm.edu.cu/index.php/revistacyf/article/view/538.