Haidy S. Ghali and  Engy Serag and  A. Samer Ezeldin,  Copper Price Prediction Model for Various Economic Situations.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2023, vol. 203(11). 805 - 815
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/10013379.