Boopathi Raja V, Elavarasan T, Pasupathi T, Manikandan S, and Abdul Hameed A. “Experimental Investigation of Waste Coconut Shell As a Partial Replacement of Coarse Aggregate in Concrete”. International Journal of Intellectual Advancements and Research in Engineering Computations, vol. 5, no. 1, Mar. 2017, pp. 1044-7, https://ijiarec.com/ijiarec/article/view/1640.