ASHENEF, A.; ENGIDAWORK, E. Fluoride levels and its safety in Tea (<i>Camellia sinensis</i>) and Khat (<i>Catha edulis</i>) imported and produced in Ethiopia. Ethiopian Journal of Environmental Studies and Management, [S. l.], v. 6, n. 2, p. 149–158, 2013. DOI: 10.4314/ejesm.v6i2.5. Disponível em: https://www.ajol.info/index.php/ejesm/article/view/86157. Acesso em: 9 oct. 2026.