F. . Zulkarnain, S. . Wibowo, and M. Z. . Sulieman, “Evaluating the Elastic Modulus of Geopolymer Concrete: The Impact of Fly Ash as a Cement Substitute using a No-Soaking Method for Sustainable Construction”, Jour. of Adv. Res. Design, vol. 126, no. 1, pp. 53–68, Mar. 2025.