Salisu, S., Mustafa, M. W., Mustapha, M., Otuoze, A. O., & Mohammed, O. O. (2019). A Hybrid PSO-ANFIS Approach for Horizontal Solar Radiation Prediction in Nigeria. ELEKTRIKA- Journal of Electrical Engineering, 18(2), 23–32. https://doi.org/10.11113/elektrika.v18n2.153