ARRIBAS DE PAZ, R.; RUIZ-FRUTOS, C. Application of the Multivariated Systemic Method to the determination of the environmental quality of the estuary of Ría of Huelva. Spanish Journal of Environmental Health, [S. l.], v. 4, n. 1-2, p. 47–55, 2004. Disponível em: https://www.ojs.diffundit.com/index.php/rsa/article/view/349. Acesso em: 12 nov. 2026.