KOT, Sebastian. Cost Structure in Relation to the Size of Road Transport Enterprises. Promet - Traffic&Transportation, [S. l.], v. 27, n. 5, p. 387–394, 2015. DOI: 10.7307/ptt.v27i5.1687. Disponível em: https://traffic2.fpz.hr/index.php/PROMTT/article/view/2551. Acesso em: 27 aug. 2025.