F. Ahwide and  Y. Aldali,  The Current Situation and Perspectives of Electricity Demand and Estimation of Carbon Dioxide Emissions and Efficiency.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2013, vol. 84(12). 979 - 984
    [viewed 05 June 2020]. Available from: https://publications.waset.org/pdf/9997922.