Etwin, Anthonius Panglima, and Harryadin Mahardika. “Analysis of Unmanned Vehicle Findings Towards Maritime Security and Defence”. International Journal of Recent Advances in Multidisciplinary Topics, vol. 3, no. 6, June 2022, pp. 65-70, https://journals.ijramt.com/index.php/ijramt/article/view/2171.