Concentration of the PM2.5 according to the sampling areas associated with the concentration of heavy metals and anions in Penang. Journal of Tropical Resources and Sustainable Science (JTRSS) , [S. l.], v. 9, n. 1, p. 13–19, 2021. DOI: 10.47253/jtrss.v9i1.705. Disponível em: https://journal.umk.edu.my/index.php/jtrss/article/view/705. Acesso em: 22 aug. 2025.