Ahmad, A., Q.- uz-Z. Khan, F. Tahir, S. Mehboob, and A. Raza. “Proposed Equation of Elastic Modulus of Hybrid Fibers Reinforced Concrete Cylinders”. Technical Journal, Vol. 24, no. 01, Mar. 2019, pp. 9-20, https://tj.uettaxila.edu.pk/index.php/technical-journal/article/view/903.