Khan, M. A. arif, S. Danish, S. Arif, S. Ramzan, and M. Mushtaq. “Replacing Natural Aggregates in Conventional Concrete With Rubber Waste”. Journal of the Pakistan Institute of Chemical Engineers, vol. 41, no. 1, Aug. 2013, pp. 41-48, http://piche.org.pk/journal/index.php/jpiche/article/view/100.