To Amiri, Shin, et al. “Some Selected Experimental Study on the Geotechnical Characteristics of Malaysian Laterite Soil Mixed With Sodium Carbonate (Na2CO3)”. International Journal of Engineering & Technology, vol. 8, no. 1.12, Apr. 2019, pp. 47-50, https://doi.org/10.14419/ijet.v8i1.12.28843.