WASET
    C. Slim,  Hybrid Approach for Country’s Performance Evaluation.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2016, vol. 118(10). 3458 - 3463
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/10005686.