Cravo A, Fernandes D, Damião T, Pereira C, Reis MP. Determining the footprint of sewage discharges in a coastal lagoon in South-Western Europe. Mar Pollut Bull. 2015;96(1-2):197-209. doi:10.1016/j.marpolbul.2015.05.029

García-Marín P, Cabaço S, Hernández I, Vergara JJ, Silva J, Santos R. Multi-metric index based on the seagrass Zostera noltii (ZoNI) for ecological quality assessment of coastal and estuarine systems in SW Iberian Peninsula. Mar Pollut Bull. 2013;68(1-2):46-54. doi:10.1016/j.marpolbul.2012.12.025