Umoh, A.A. and Olusola, K.O. (2012) “Compressive Strength and Static Modulus of Elasticity of Periwinkle Shell Ash Blended Cement Concrete”, International Journal of Sustainable Construction Engineering and Technology, 3(2), pp. 45–55. Available at: https://publisher.uthm.edu.my/ojs/index.php/IJSCET/article/view/441 (Accessed: 8 April 2026).