1. Associated British Ports. 2005. Technical assessment method. Morphological Alterations.
2. Adams, S.M. 2005. Using multiple response bioindicators to assess the health of estuarine ecosystems: an operational framework. In Estuarine indicators, ed. S.A. Bortone. USA: Routledge.
3. Besada, V., J.M. Andrade, F. Schultze, and J.J. González. 2010. Comparision of the 2000 and 2005 spatial distribution of heavy metals in wild mussels from the North-Atlantic Spanish coast. Ecotoxicology and Environmental Safety. doi: 10.1016/j.ecoenv.2010.10.002 .
4. Boorman, L. 2003. Saltmarsh review. An overview of coastal saltmarshes, their dynamic and sensitivity characteristics for conservation and management. Peterborough: JNCC.
5. Borja, A., J. Franco, and V. Pérez. 2000. A marine biotic index to establish the ecological quality of soft-bottom benthos within European estuarine and coastal environments. Marine Pollution Bulletin 40: 1100–1114.