Jhatial, A. A., Goh, W. I., Sohu, S., Mangi, S. A., Mastoi, A. K. “Preliminary Investigation of Thermal Behavior of Lightweight Foamed Concrete Incorporating Palm Oil Fuel Ash and Eggshell Powder”, Periodica Polytechnica Civil Engineering, 65(1), pp. 168–180, 2021. https://doi.org/10.3311/PPci.16498