OKORO, R. C.; IWUJI, P. C. Investigation of GSM Signal Strength in Rural Communities in the South-Eastern Region of Nigeria. European Scientific Journal, ESJ, [S. l.], v. 15, n. 15, p. 140, 2019. DOI: 10.19044/esj.2019.v15n15p140. Disponível em: https://test.eujournal.org/index.php/esj/article/view/12071. Acesso em: 20 apr. 2025.