Ardhiansyah, Ilham, et al. “Investigation Influence of Styrene Butadiene Rubber on Physical, Mechanical and Thermal Properties of Polypropylene Composite for 3D Printing Filaments”. Engineering, Technology & Applied Science Research, vol. 15, no. 5, Oct. 2025, pp. 27793-9, doi:10.48084/etasr.13059.