Saputra, I. H., E. wahyu Abryandoko, and M. Nurudduja. “Optimization of Concrete Mix Composition Containing Fly Ash and Slag Using a Machine Learning Algorithm for Compressive Strength Prediction”. Engineering Science Letter, vol. 5, no. 02, July 2026, pp. 143-52, doi:10.56741/IISTR.esl.002300.