SMERDU, Ivan. Impact of Ecology on the Productivity of Road Commercial Vehicles. Promet - Traffic&Transportation, [S. l.], v. 11, n. 5, p. 257–261, 2012. Disponível em: https://traffic2.fpz.hr/index.php/PROMTT/article/view/2342. Acesso em: 27 aug. 2025.