1. Energy outlook 2018 with projections to 2050;Annual,2018
2. The growing importance of U.S. petroleum and LNG exports;Hickman,2018
3. Imo. Prevention of air pollution from ships. http://www.imo.org/en/OurWork/Environment/PollutionPrevention/AirPollution/Pages/Air-Pollution.aspx (accessed Jun 19)
4. UNCTAD. Review of maritime transport; UNCTAD/RMT/2018,2018
5. LNG regulatory update;Nilsen,2018