Borja, Angel, Elliott, Mike, Andersen, Jesper H., Cardoso, Ana C., Carstensen, Jacob, Ferreira, João G., Heiskanen, Anna Stiina, Marques, João C., Neto, João M., Teixeira, Heliana, Uusitalo, Laura, Uyarra, María C., Zampoukas, Nikolaos, "Good Environmental Status of marine ecosystems: What is it and how do we know when we have attained it?", Marine Pollution Bulletin, 2013