Teh Hao Wern, Calvin, and Noorwirdawati Ali. “Fresh Properties and Compressive Strength of 3D Printing Concrete Containing GGBS With Varies in Water-Cement Ratio”. Recent Trends in Civil Engineering and Built Environment, vol. 5, no. 1, July 2024, pp. 205-1, https://penerbit.uthm.edu.my/periodicals/index.php/rtcebe/article/view/8036.