The usage of mineral waters in Bulgaria as a factor for the development of the municipalities. Research Announcements "Heritage BG", [S. l.], n. 6, p. 66–77, 2025. DOI: 10.58894/AR-HBg.2024.6.66-77. Disponível em: https://periodicals.uni-sofia.bg/index.php/AR-NBg/article/view/1315. Acesso em: 10 mar. 2026.