Gasparre, Angelo, Luca Beltrametti, and Luca Persico. “Industry 4.0 and Digital Innovation in Manufacturing: State of the Art Technology and Future Prospects in the Italian Mechanical Engineering Sector”. puntOorg International Journal 6, no. 2 (May 24, 2021): 99–111. Accessed October 23, 2021. https://www.puntoorginternationaljournal.org/index.php/PIJ/article/view/110.