1. http://www.unep.ch/seas/main/hhist.html.
2. http://www.unep.ch/seas/mappage1.html.
3. http://www.gpa.unep.org/about/default.htm.
4. http://www.unep.ch/seas/main/hhist.html.
5. The regional seas in the 21st century;Salmona;Ocean & Coastal Management,2002