1. Report of the World Commission on Environment and Development: Our Common Future Transmitted to the General Assembly of UN as an Annex to Document A/42/427—Development and International Cooperation: Environment
https://www.are.admin.ch/are/it/home/media-e-pubblicazioni/pubblicazioni/sviluppo-sostenibile/brundtland-report.html
2. Strategic Research and Innovation Agenda for the Partnership on Zero-Emission Waterborne Transport. Technical Platform: Waterborne, June 2021
https://www.waterborne.eu/images/210601_SRIA_Zero_Emission_Waterborne_Transport_1.2_final_web_low.pdf
3. A Zero Emission Blueprint for Shipping. International Chamber of Shipping in collaboration with Ricardo, November 2021
https://www.ics-shipping.org/wp-content/uploads/2021/11/A-zero-emission-blueprint-for-shipping.pdf