GONTASZEWSKA, A.; KRAIŃSKI, A. SLUDGE EFFECT ON GROUNDWATER QUALITY. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 85–91, 2006. DOI: 10.17770/etr2003vol1.1988. Disponível em: https://journals.ru.lv/index.php/ETR/article/view/1988.. Acesso em: 1 may. 2024.