C. Ardil,  Aircraft Supplier Selection Process with Fuzzy Proximity Measure Method using Multiple Criteria Group Decision Making Analysis.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2023, vol. 196(4). 289 - 298
    [viewed 10 May 2024]. Available from: https://publications.waset.org/pdf/10013047.