Nitrogen forms and total phosphorus in water courses: a study at Maringá stream, Paraná State - doi: 10.4025/actascitechnol.v35i4.14018. Acta Scientiarum. Technology, [S. l.], v. 35, n. 4, p. 711–716, 2013. DOI: 10.4025/actascitechnol.v35i4.14018. Disponível em: https://periodicos.uem.br/actascitechnol/index.php/ActaSciTechnol/article/view/14018. Acesso em: 2 jun. 2026.