Siang, A. J. L. M., Wijeyesekera, D. C., S. Yahya, S. M. A., & Ramlan, M. (2014). Innovative Testing Investigations on the Influence of Particle Morphology and Oil Contamination on the Geotechnical Properties of Sand. International Journal of Integrated Engineering, 6(2). https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/930