E. Omo-Oghogho, I. A. Essienubong, C.C Kwasi-Effah & E.G. Sadjere. 2021. “Empirical Modelling and Estimation of Solar Radiation from Tilted Surfaces Relative to Angular Solar Relations”. Journal of Energy Technology and Environment 3 (4). https://doi.org/10.37933/nipes.e/3.4.2021.7.