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. European Journal of Tourism Research, [S. l.], v. 26, p. 2612, 2020. DOI: 10.54055/ejtr.v26i.1943. Disponível em: https://ejtr.vumk.eu/index.php/about/article/view/1943. Acesso em: 14 jun. 2026.