Otman M. M. Elbasir, and Samer Haded. “AN OVERVIEW ON GEOPOLYMER OR ALKALI-ACTIVATED BINDER ALTERNATIVE TO PORTLAND CEMENT AS ECOFRIENDLY CONSTRUCTION MATERIAL”. Malaysian Journal of Industrial Technology , vol. 5, no. 1, June 2021, pp. 61-67, https://ejournal.unikl.edu.my/index.php/mjit/article/view/586.