WASET
    N. Borjalilu and  P. Rabiei and  A. Enjoo,  A Fuzzy TOPSIS Based Model for Safety Risk Assessment of Operational Flight Data.   journal   = {International Journal of Aerospace and Mechanical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2018, vol. 144(12). 1073 - 1080
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/10009846.