WASET
    M. Schulze and  P. Crespo Del Granado,  Implementation of Feed-in Tariffs into Multi-Energy Systems.   journal   = {International Journal of Energy and Power Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2009, vol. 29(5). 1190 - 1195
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/2282.