Empirical models

Bouchouicha, K., M. A. Hassan, N. Bailek, and N. Aoun, "Estimating the global solar irradiation and optimizing the error estimates under Algerian desert climate", Renewable Energy, vol. 139, pp. 844-858, 2019.
Hassan, M. A., A. Khalil, S. Kaseb, and M. A. Kassem, "Independent models for estimation of daily global solar radiation: A review and a case study", Renewable and Sustainable Energy Reviews, vol. 82, pp. 1565–1575, 2018.
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