Sekulová, Jana, a Ivan Nedeliak. „UTILIZATION OF GAP MODEL IN PROVIDING OF SERVICES IN THE RAILWAY FREIGHT TRANSPORT". Perner’s Contacts 8, no. 4 (prosinec 20, 2013): 67–75. Viděno listopad 22, 2024. https://pernerscontacts.upce.cz/index.php/perner/article/view/770.