KAROLINCZAK, B. Cost-effectiveness analysis of wastewater treatment by the activated sludge and biofilter methods. Economics and Environment, [S. l.], v. 70, n. 3, p. 12, 2019. Disponível em: https://www.ekonomiaisrodowisko.pl/journal/article/view/72. Acesso em: 25 apr. 2024.