http://www.medies.net/staticpages.asp?aID=363&overRideCategory=1
http://www.medies.net/_uploaded_files/publications/water_greek_full.pdf
http://www.wwf.gr/enviromental-education/env-edu-sea
http://www.exandasdocumentaries.com/vimeo.php?movie=22518777
http://www.youtube.com/watch?v=gLBE5QAYXp8