Ponce, R., Forja, J., & Gómez-Parra, A. (2000). Influence of anthropogenic activity on the vertical distribution of Zn, Cd, Pb and Cu in interstitial water and coastal marine sediments (Cádiz bay, SW Spain). Iniversidad Autónoma de Baja California.

Ponce, R., JM Forja, und A. Gómez-Parra. Influence of Anthropogenic Activity On the Vertical Distribution of Zn, Cd, Pb and Cu in Interstitial Water and Coastal Marine Sediments (Cádiz Bay, SW Spain). Iniversidad Autónoma de Baja California, 2000.

Ponce, R., JM Forja, und A. Gómez-Parra. Influence of Anthropogenic Activity On the Vertical Distribution of Zn, Cd, Pb and Cu in Interstitial Water and Coastal Marine Sediments (Cádiz Bay, SW Spain). Iniversidad Autónoma de Baja California, 2000.