Oswaldo Redig De Campos Filho, Waleria Guerreiro Lima, and Rodrigo Felipe Albuquerque Paiva De Oliveira. 2019. “Smart Sustainable Cities: Using a Fuzzy Inference System To Determine Their Global Score”. Global Journal of Science Frontier Research 19 (H1):1-25. https://journalofscience.org/index.php/GJSFR/article/view/2413.