Goodness C. Aye,  The Effect of Oil Price Uncertainty on Food Price in South Africa.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2015, vol. 101(5). 1380 - 1385
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/10001097.