Calvo, Isidro, Ismael Etxeberria-Agiriano, Miguel A Iñigo, and Pablo González-Nalda. 2016. “Key Vulnerabilities of Industrial Automation and Control Systems and Actions to Prevent Cyber-Attacks”. International Journal of Online and Biomedical Engineering (iJOE) 12 (01):pp. 9-16. https://doi.org/10.3991/ijoe.v12i1.4888.