Zaini, M. A. . “Risk Analysis and Mitigation With Risk Assessment Method at PT. Semboro, Jember East Java”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 60, no. 1, Aug. 2021, pp. 131-43, https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/13084.