Sánchez-Cano, J. E.; Garcia-Quilachamin, W. X.; Pérez-Véliz, J.; Herrera-Tapia, J.; Atiencia-Fuentes, K. Review of Methods to Reduce Energy Consumption in A Smart City Based On IoT and 5G Technology. Int. J. Onl. Eng. 2021, 17, pp. 4-21.