A. A. Jhatial, W. I. Goh, S. Sohu, S. A. Mangi, and A. K. Mastoi, “Preliminary Investigation of Thermal Behavior of Lightweight Foamed Concrete Incorporating Palm Oil Fuel Ash and Eggshell Powder”, Period. Polytech. Civil Eng., vol. 65, no. 1, pp. 168–180, Jan. 2021.