1. FAO, UNEP, IMO, UNDP, IUCN, WorldFish Center and GRID-Arendal,. (Green) (economy in a blue world). 2012. ISBN 978-82-7701-104-2. 〈http://www.unep.org/pdf/(Green)_Economy_Blue_Full.pdf〉.
2. Making the case for marine spatial planning in the Maltese Islands;Deidun;Ocean Dev. Int. Law,2011
3. Secretariat of the Convention on Biological Diversity. Global Biodiversity Outlook 4, 2014, p. 155. ISBN 92-9225-540-1. 〈https://www.cbd.int/gbo4/〉.
4. United Nations. World Population Prospects The 2012 Revision Key Findings and Advance Tables, in: Affairs DoEaS, editor, New York, 2013, p. 227. 〈http://esa.un.org/unpd/wpp/publications/Files/WPP2012_HIGHLIGHTS.pdf〉.
5. The coasts of our world: ecological, economic and social importance;Martínez;Ecol. Econ.,2007