References
Smith, S.R. & C. Deerenberg, 2012. A ranking of coastal EU habitat types using Ecosystem Services. IMARES rapport C159/12 for EcoShape Building with Nature.
Millenium Ecosystem Assessment, 2003. Ecosystems and Human Well-being. A framework for assessment. Island Press, Washington, DC. http://pdf.wri.org/ecosystems_human_wellbeing.pdf