Almeida, Cleuma Christir Silva, et al. “Bioindicators of Air Quality Species | Bioindicadores De espécies De Qualidade Do Ar”. Geama Journal - Environmental Sciences, vol. 3, no. 2, June 2017, pp. 94-102, https://www.journals.ufrpe.br/index.php/geama/article/view/1026.