Anésio de Leles F. Filho and  Wesley R. de Oliveira and  Jéssica S. G. Pena and  Jorge A. C. Angarita,  Evaluation of Methodologies for Measuring Harmonics and Inter-Harmonics in Photovoltaic Facilities.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2015, vol. 107(11). 1305 - 1312
    [viewed 17 October 2021]. Available from: https://publications.waset.org/pdf/10003180.