Air Pollution Monitoring System For Various Cities Using Cloud Computing And The Internet Of Things. Journal of Pharmaceutical Negative Results, [S. l.], v. 10, n. 1, p. 73–81, 2019. DOI: 10.47750/. Disponível em: https://www.pnrjournal.com/index.php/home/article/view/10727.. Acesso em: 2 jul. 2026.