Muñoz P, Dezileau L, Lange C, Cardenas L, Sellanes J, Salamanca MA, Maldonado A.  2012.  Evaluation of sediment trace metal records as paleoproductivity and paleoxygenation proxies in the upwelling center off Concepción, Chile (36°S). Variability of the coastal upwelling and coastal transition zones off central-southern Chile. 92?95:66-80.