WASET
    Ahmed Kayad Abdourazak and  Abderafi Souad and  Zejli Driss and  Idriss Abdoulkader Ibrahim,  Forecasting Direct Normal Irradiation at Djibouti Using Artificial Neural Network.   journal   = {International Journal of Energy and Power Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2017, vol. 124(4). 393 - 396
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/10006771.