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2. Third IMO greenhouse gas study 2014 – executive summary;IMO (International Maritime Organization),2014
3. Interim guidelines on the method of calculation of the energy efficiency design index for new ships. (EEDI) MEPC.1/Circ.681;(International Maritime Organization) IMO,2009
4. Guidelines for voluntary use of the ship energy efficiency operational indicator (EEOI);(International Maritime Organization) IMO,2009
5. Energy Efficiency Measures, Ship Energy Efficiency Management Plan (SEEMP) and Energy Efficiency Operational Indicator (EEOI);(International Maritime Organization) IMO,2020