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https://unctad.org/en/PublicationsLibrary/rmt2018_en.pdf
. Accessed 20 Oct 2019
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http://www.ics-shipping.org/shipping-facts/shipping-and-world-trade/global-supply-and-demand-for-seafarers
. Accessed 27 Oct 2019
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5. Gartner.
https://www.gartner.com/en/information-technology/glossary/digitalization
. Accessed 25 Oct 2019