Gunarti, A. S. S., Y. Zaika, A. Munawir, E. A. Suryo, and Harimurti. “Identifying the Microstructure and Mechanical Properties of Expansive Soil Stabilized Using Fly Ash and Waste Foundry Sand”. Eastern-European Journal of Enterprise Technologies, vol. 6, no. 6 (126), Dec. 2023, pp. 31-40, doi:10.15587/1729-4061.2023.286991.