Tütünkov-Hrisztov J. The Role of Intermediaries in the Tourism of the European Union: Supervisor: Professor Dr. Habil Antal Aubert CSc Institution awarding the Ph. D. Degree: University of Pécs - Faculty of Science Doctoral School of Earth Sciences Date of defence: 06 September 2019. EJTR [Internet]. 2020 Aug. 10 [cited 2026 May 14];26:2612. Available from: https://ejtr.vumk.eu/index.php/about/article/view/1943