Lisa J. Piergallini,  An Empirical Investigation of Montesquieu’s Theories on Climate.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2016, vol. 114(6). 2017 - 2028
    [viewed 29 February 2020]. Available from: https://publications.waset.org/pdf/10004721.