AZHAR, M.; SHABBIR, A. 5G Networks: Challenges and Techniques for Energy Efficiency. Engineering, Technology & Applied Science Research, Greece, v. 8, n. 2, p. 2864–2868, 2018. DOI: 10.48084/etasr.1623. Disponível em: https://etasr.com/index.php/ETASR/article/view/1623. Acesso em: 28 jan. 2022.