Nadhirah Tajurahim, Nurul Ainina, et al. “A Multi-Criteria Decision Analysis Approach for Managing End-of-Life Options of 3D Printing Thermoplastic”. International Journal of Integrated Engineering, vol. 17, no. 4, Aug. 2025, pp. 16-26, https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/18918.