M. Sofyan, H. Parung, M. W. Tjaronge, and A. A. Amiruddin, “A Study on the Bond Characteristics of Steel Bars in Concrete Containing Polypropylene (PP) Plastic Particles as Fine Aggregate”, Eng. Technol. Appl. Sci. Res., vol. 14, no. 5, pp. 16989–16997, Oct. 2024.