B. D. Oluyemi-Ayibiowu, O. J. Omomomi, and O. G. Fadugba, “GEOTECHNICAL INVESTIGATION OF OSOGBO-IWO ROAD COLLAPSIBLE SOIL’S CLAY FRACTION AND IMPROVEMENT USING BENTONITE”, JCEST, vol. 13, no. 2, pp. 97-111, Aug. 2022.