MADUKA, N. C.; OKAFOR, C. S.; ARCHIBONG, E. I. INVESTIGATION OF QUALITY OF SERVICE (QoS) OF GSM NETWORK PROVIDERS AT FEDERAL UNIVERSITY, GUSAU, ZAMFARA STATE. Nigerian Journal of Physics, [S. l.], v. 30, n. 2, p. 78–85, 2021. Disponível em: https://njp.nipngr.org/index.php/njp/article/view/97. Acesso em: 19 sep. 2024.