SUSTAINABLE DEVELOPMENT TOURISM: RESEARCH IN VIETNAM AFTER COVID -19. Journal of Pharmaceutical Negative Results, [S. l.], p. 2397–2407, 2022. DOI: 10.47750/pnr.2022.13.S06.312. Disponível em: https://mail.pnrjournal.com/index.php/home/article/view/2228.. Acesso em: 9 oct. 2025.