Ahmed B. Shaath, Mochamad Agung Wibowo, and Jati Hatmoko. “Construction 3D Printing Concrete Within Indonesia and Malaysia of the Sustainable Future Houses: Environmental Aspect”. American Scientific Research Journal for Engineering, Technology, and Sciences, vol. 88, no. 1, July 2022, pp. 248-70, https://www.asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/7742.