JAROSIEWICZ, Anna. TRANSFORMATION OF THE WATER QUALITY IN THE SŁUPIA RIVER (POLAND). ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 2, p. 64–70, 2015. DOI: 10.17770/etr2009vol2.1024. Disponível em: https://journals.ru.lv/index.php/ETR/article/view/1024.. Acesso em: 5 may. 2025.