Smart City System Review: Challenges and Opportunities for Implementation in Urban Areas. Journal of Renewable Engineering, [S. l.], v. 2, n. 3, p. 19–26, 2025. DOI: 10.62872/cca5ng45. Disponível em: https://ejournal-nawalaedu.com/index.php/JORE/article/view/1537. Acesso em: 30 nov. 2025.