1. Algan, O., Balkıs, N., Çağatay, M. N., & Sarı, E. (2009). The sources of metal contents in the shelf sediments from the Marmara Sea, Turkey. Environmental Geology, 46(6–7), 932–950.
2. Alshemmari, H., Ali, L., Alotaibi, Y. (2012) Trace metal speciation in marine sediments from. Aquatic Ecosystem Health & Management 15(S1)(1463–4988):33–40.
3. Alvarez, E., Mochón, M. C., Sanchez, J., & Rodríguez, M. T. (2002). Heavy metal extractable forms in sludge from wastewater treatment plants. Chemosphere, 47(7), 765–775.
4. Aprile, F., & Bouvy, M. (2008). Distribution and enrichment of heavy metals at the Tapacurá River basin, northeastern Brazil. Brazilian Journal of Aquatic Science and Technology, 12(1), 1–8.
5. Boughriet, A., Proix, N., Billon, G., Recourt, P., & Ouddane, B. (2006). Environmental impacts of heavy metal discharges from a smelter in Deûle-canal sediments (northern France): concentration levels and chemical fractionation. Water Air and Soil Pollution, 180(1–4), 83–95.