Khan, S. I., G. T. Abegaz, and . B. Jaleta. “A High-Performance Geopolymer Concrete - an Experimental Study Using Fly Ash, GGBS and Copper Slag”. Journal of Structural Engineering, vol. 48, no. 1, Nov. 2024, pp. 71-84, http://14.139.176.44/index.php/JOSE/article/view/338.