Pancorbo Crespo, Jaime, Luis Guerrero Gómez, and Javier Gonzalez Arias. “The "Digital twin". Digitization Process from the Point of View of a Classification Society”. Ciencia y tecnología de buques 13, no. 26 (January 30, 2020): 19-28. Accessed September 20, 2020. https://shipjournal.co/index.php/sst/article/view/194.