da Silva Oliveira, A., M. . Nikaido, M. Smidt Celere, and S. I. Segura-Muñoz. “The Relevance of Sludge Generated in Wastewater Biological Treatment Systems, With an Emphasis on Ribeirão Preto, São Paulo, Brazil: DOI: 10.15343/0104-7809.200630.4.15”. O Mundo Da Saúde, vol. 30, no. 4, June 2020, pp. 634-43, https://revistamundodasaude.emnuvens.com.br/mundodasaude/article/view/685.