ZUMBROICH, T. J. To Strengthen the Teeth and Harden the Gums - Teeth blackening as medical practice in Asia, Micronesia and Melanesia. Ethnobotany Research and Applications, [S. l.], v. 9, p. 097–113, 2011. Disponível em: https://ethnobotanyjournal.org/index.php/era/article/view/433. Acesso em: 18 oct. 2021.