Silva, Agostinho da, Andreia Dionísio, and Luís Coelho. “Improving Industry 4.0 | A Service Science Perspective”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 52, no. 2 (June 23, 2020): 17–32. Accessed May 7, 2024. https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/11329.