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Walker TR. Green Marine: An environmental program to establish sustainability in marine transportation. Marine Pollution Bulletin. April 2016, 105 (1): 199–207. PMID 26899158. doi:10.1016/j.marpolbul.2016.02.029.
Walker TR, Adebambo O, Del Aguila Feijoo MC, Elhaimer E, Hossain T, Edwards SJ, Morrison CE, Romo J, Sharma N, Taylor S, Zomorodi S. Environmental Effects of Marine Transportation. World Seas: An Environmental Evaluation. 2019: 505–530. ISBN 978-0-12-805052-1. S2CID 135422637. doi:10.1016/B978-0-12-805052-1.00030-9.
United Nations Environment Programme in collaboration with GEF, the University of Kalmar, the Municipality of Kalmar, Sweden, and the Governments of Sweden, Finland and Norway. (2006). Challenges to international waters: regional assessments in a global perspective美國國會圖書館的存檔,存档日期2006-09-29. Nairobi, Kenya: United Nations Environment Programme. Retrieved 2010-01-05.
Mallouppas, George; Yfantis, Elias Ar. Decarbonization in Shipping Industry: A Review of Research, Technology Development, and Innovation Proposals. Journal of Marine Science and Engineering. 2021, 9 (4): 415. ISSN 2077-1312. doi:10.3390/jmse9040415.