POLÍVKA, Petr; DRAHOTSKÝ, Ivo; PRŮŠA, Petr. Ecological Comparison of Airships to Other Types of Transport. Spectrum of Engineering and Management Sciences, [S. l.], v. 2, n. 1, p. 223–233, 2024. DOI: 10.31181/sems21202427p. Disponível em: http://sems-journal.org/index.php/sems/article/view/27.. Acesso em: 22 dec. 2024.