Omar, Sabri, Muhd Khudri Johari, and Abdul Ghani Abdul Samad. “Assessment on Risk Management of Helicopter Services for Offshore Installations”. International Journal of Engineering & Technology 7, no. 4.13 (October 9, 2018): 229–231. Accessed May 3, 2024. https://www.sciencepubco.com/index.php/ijet/article/view/22988.