C. K. Kiptum, V. M. Mwirigi, and S. O. Ochieng, “COMPARING COMPRESSIVE STRENGTHS OF LAYERED AND RANDOM PLACEMENT OF EXPANDED POLYSTYRENE WASTES IN QUARRY DUST BLOCKS”, J. Civ. Eng. Sci. Technol., vol. 11, no. 1, pp. 57–63, Apr. 2020.