Mansyur, Parea Rusan Rangan, M. Tumpu,. “The Potential Utilization of Candlenut Shell Waste As Coarse Aggregate Replacement in Concrete”. Design Engineering, no. 1 (January 23, 2022): 458-465. Accessed October 6, 2022. http://thedesignengineering.com/index.php/DE/article/view/8820.