F. Raupit, A. Saggaff, C. S. Tan, Y. L. Lee, and M. Md Tahir, “Splitting Tensile Strength of Lightweight Foamed Concrete with Polypropylene Fiber”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 7, no. 2, pp. 424–430, Apr. 2017.