Prego, R., Belzunce, M., Cobelo, A., & Helios-Rybicka, E. (2008). Particulate metal in the Ulla River estuary: State and sources of contamination (Arosa Ria, NW Iberian Peninsula). Ciencias Marinas, 34(3), 381–388. https://doi.org/10.7773/cm.v34i3.1399