DIMITROVA, M. Opportunities for improving congress tourismʼs competitiveness: Supervisor: Prof. Tichomir Pelov, Ph.D, University of National and World Economy, Sofia, Bulgaria Institution awarding the Ph. D. Degree: University of National and World Economy, Sofia, Bulgaria Date of defence: 25 th March 2010. European Journal of Tourism Research, [S. l.], v. 3, n. 2, p. 135–137, 2010. DOI: 10.54055/ejtr.v3i2.57. Disponível em: https://ejtr.vumk.eu/index.php/about/article/view/57. Acesso em: 20 mar. 2025.