GRAF, Renata; SOBKOWIAK, Leszek. Usefulness of hydrographic and sozological databases in ecological studies of rivers in Poland. Ecological Questions, [S. l.], v. 16, p. 109–118, 2012. DOI: 10.12775/v10090-012-0011-5. Disponível em: https://apcz.umk.pl/EQ/article/view/v10090-012-0011-5. Acesso em: 8 jul. 2025.