Paulo, Jacob Louies Rohi W., Michelle Airah N. Pablo, Joshua P. Pocaan, Michael Angelo B. Promentilla, Arnel B. Beltran, Marish S. Madlangbayan, Botvinnik L. Palattao, et al. “Life Cycle Assessment of Phosphogypsum As Filler Material for Coal Fly Ash-Based Geopolymer”. Civil Engineering Journal 11, no. 9 (September 1, 2025): 3961–3980. Accessed October 28, 2025. https://civilejournal.org/index.php/cej/article/view/6187.