STANKOVA, Mariya; KALEYCHEV, Svetoslav. Certification as a managerial tool in tourism: identifying the effects on sustainability and competitiveness. International Scientific Conference “Business and Management”, [S. l.], v. 13, p. 1–8, 2023. DOI: 10.3846/bm.2023.1011. Disponível em: https://conferences.vilniustech.lt/index.php/BM/article/view/315. Acesso em: 13 sep. 2026.