BÍRÓ, C. Profile of German senior tourists travelling on river cruise ships in the post-COVID period. International Journal of Business and Social Science Research, [S. l.], v. 4, n. 5, p. 1–11, 2023. DOI: 10.47742/ijbssr.v4n5p1. Disponível em: https://ijbssrnet.com/index.php/ijbssr/article/view/152. Acesso em: 5 nov. 2025.