NWOKOCHA, C.; CHINEKE, T.; NWOFOR, O.; OKORO, U. Estimation of Solar Radiation in South Eastern Nigeria. International Journal of Natural and Applied Sciences, [S. l.], v. 5, n. 3, 2012. DOI: 10.4314/ijonas.v5i3. Disponível em: https://www.ajol.info/index.php/ijonas/article/view/76662. Acesso em: 14 oct. 2026.