Juan P. Novoa and  Mario A. Rios,  Conversion of HVAC Lines into HVDC in Transmission Expansion Planning.   journal   = {International Journal of Energy and Power Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2017, vol. 132(12). 1190 - 1196
    [viewed 16 April 2024]. Available from: https://publications.waset.org/pdf/10008249.