Radioactivity Properties of Natural Salts Proving a Strong Prophylaxis in Covid-19 Pandemic. Global Journal of Medical Research, [S. l.], v. 21, n. K1, p. 51–57, 2021. Disponível em: https://medicalresearchjournal.org/index.php/GJMR/article/view/2366. Acesso em: 13 aug. 2026.