Fahrizal Zulkarnain. “Analysis of Polypropylene Fiber and HDPE Plastic Substitution With Viscocrete 8670 MN towards Tension Strength and Concrete Elasticity Modulus”. International Journal of Intelligent Systems and Applications in Engineering, vol. 12, no. 4, June 2024, pp. 3971-8, https://ijisae.org/index.php/IJISAE/article/view/6957.