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Millero, F. J.; Feistel, R.; Wright, D. G.; McDougall, T. J. (2008). „The composition of Standard Seawater and the definition of the Reference-Composition Salinity Scale”. Deep-Sea Research Part I: Oceanographic Research Papers. 55: 50—72. Bibcode:2008DSRI...55...50M. doi:10.1016/j.dsr.2007.10.001.
Shaffer, G. .; Olsen, S. M.; Pedersen, J. O. P. (2009). „Long-term ocean oxygen depletion in response to carbon dioxide emissions from fossil fuels”. Nature Geoscience. 2 (2): 105—09. Bibcode:2009NatGe...2..105S. doi:10.1038/ngeo420.
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Staff, NGS (27. 9. 2011). „Sea”. National Geographic (online). Washington, DC: The National Geographic Society (NGS). Архивирано из оригинала 15. 03. 2018. г. Приступљено 7. 1. 2017. „[Quote:] ...a sea is a division of the ocean that is enclosed or partly enclosed by land...”