Douša, Milan. „RELATION COMPARISON OF SELECTED RAILWAY TRANSPORT COMPANIES USING THE SERVQUAL METHOD". Perner’s Contacts 14, no. 4 (prosinec 30, 2019): 12–25. Viděno březen 29, 2024. https://pernerscontacts.upce.cz/index.php/perner/article/view/435.