Testing the normality of residuals on regression model for the growth of sludge microbes on PEG 600. Journal of Environmental Microbiology and Toxicology, [S. l.], v. 3, n. 1, p. 14–17, 2015. DOI: 10.54987/jemat.v3i1.242. Disponível em: https://journal2.hibiscuspublisher.com/index.php/JEMAT/article/view/242. Acesso em: 11 may. 2026.