Ordóñez-Iriarte, J. M., M. González-Estecha, J. J. Guillén-Pérez, M. J. Martínez-García, B. Gaviña Fernández-Montes, M. I. Aparicio-Madre, and A. Bodas-Pinedo. “Risk Factors Associated With the Blood Lead Levels of Children in the Community of Madrid in 2010”. Spanish Journal of Environmental Health, vol. 13, no. 2, Dec. 2013, pp. 169-77, https://ojs.diffundit.com/index.php/rsa/article/view/528.