C.I. , Elekachi; A.O.C. , Nwokoye; N.L. , Okoli. Developed Empirical Models for the Estimation of Global Solar Radiation with Sunshine Hours and other Meteorological Data on a Horizontal Surface in Some Cities in North Central Geopolitical Zone in Nigeria . African Journal of Education,Science and Technology (AJEST), [S. l.], v. 3, n. 4, p. Pg 87–96, 2017. Disponível em: http://ajest.org/index.php/ajest/article/view/191. Acesso em: 3 apr. 2026.