Chandio, S. A., B. A. Memon, M. Oad, F. A. Chandio, and M. U. Memon. “Effect of Fly Ash on the Compressive Strength of Green Concrete”. Engineering, Technology & Applied Science Research, vol. 10, no. 3, June 2020, pp. 5728-31, doi:10.48084/etasr.3499.