M. Bouri and  L. Chraïbi and  N. Sefiani,  Environmental Competency Framework: Development of a Modified 2-Tuple Delphi Approach.   journal   = {International Journal of Industrial and Systems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2022, vol. 191(11). 306 - 314
    [viewed 20 September 2024]. Available from: https://publications.waset.org/pdf/10012785.