JORILLO JR., Pablo A.; VERDEJO, Benjamin D.. Pozzolanic Behavior of Mt. Pinatubo Ejecta Under Natural and Accelerated Curing Condition. Philippine Engineering Journal, [S.l.], v. 16, n. 1, sep. 2021. ISSN 2718-9287. Available at: <https://journals.upd.edu.ph/index.php/pej/article/view/8059>. Date accessed: 30 sep. 2025.