J. K. Visser and H. T. Malan, Identification of Risks Associated with Process Automation Systems. journal = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology. June 2019, vol. 151(7). 1056 - 1063 [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/10010629.