VELÁZQUEZ, M. A.; PIMENTEL, J. L.; ORTEGA, M. A study of boron distribution in water sources of the Duero river basin, by using multivariate statistical analysis. Revista Internacional de Contaminación Ambiental, [S. l.], v. 27, n. 1, p. 19–30, 2011. Disponível em: https://www.revistascca.unam.mx/rica/index.php/rica/article/view/23836. Acesso em: 19 may. 2024.