ZEŃCZAK, W. The Selected Ways of Improving the Factors of Energy Efficiency of Ships. Scientific Journal of Gdynia Maritime University, [S. l.], n. 108, p. 181–196, 2018. DOI: 10.26408/108.15. Disponível em: https://sjgmu.umg.edu.pl/index.php/sjgmu/article/view/86. Acesso em: 4 apr. 2025.