Azed, M.A., and D.S. Ing. “Properties of Concrete Containing Microwaved Sewage Sludge Ash”. Journal of Mechanical Engineering and Sciences 15, no. 4 (December 31, 2021): 8469–8479. Accessed April 19, 2024. https://journal.ump.edu.my/jmes/article/view/6071.