Pratas, João, Susana Garrido, and Carina Pimentel. “Sustainable Inland Waterway Transportation Systems: Framework Proposal”. European Journal of Sustainable Development 12, no. 4 (October 1, 2023): 40. Accessed December 21, 2024. https://ecsdev.org/ojs/index.php/ejsd/article/view/1441.