Zumbroich, T. J. “"Ni Vazana Tsy Aseho vahiny’ - "Don’t Show Your Molars to strangers&Quot; - Expressions of Teeth Blackening in Madagascar”. Ethnobotany Research and Applications, vol. 10, Nov. 2012, pp. 523-40, https://ethnobotanyjournal.org/index.php/era/article/view/715.