IBRAHIM, U.; MUSA, B.; LAWAL, M. Estimating the Variability of Tropospheric Radio Refractivity and Field Strength over Enugu, South-East Nigeria. International Journal of Science for Global Sustainability, [S. l.], v. 10, n. 2, p. 251–257, 2024. DOI: 10.57233/ijsgs.v10i2.678. Disponível em: https://www.fugus-ijsgs.com.ng/index.php/ijsgs/article/view/678. Acesso em: 29 apr. 2026.