WASET
    Donglan Zha and  Jiansong Si,  Measurement of CES Production Functions Considering Energy as an Input.   journal   = {International Journal of Energy and Power Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2016, vol. 120(12). 1507 - 1510
    [viewed 29 March 2024]. Available from: https://publications.waset.org/pdf/10007381.