Kampf, R., Becková, H. a Bártová, P. (2010) „FACTORS INFLUENCING THE COMPETITION AMONG THE PARTICULAR TRANSPORT KINDS", Perner’s Contacts, 5(4), s. 89–93. Dostupné z: https://pernerscontacts.upce.cz/index.php/perner/article/view/1046 (Viděno: 22 listopad 2024).