M.R. Ebrahimi and  Z. Ghofrani and  M. Ehsan,  Transmission Loss Allocation via Loss Function Decomposition and Current Projection Concept.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2010, vol. 38(2). 323 - 326
    [viewed 29 January 2020]. Available from: https://publications.waset.org/pdf/12690.