ARIF, M.; MOON, C. J. Chemistry of tourmaline from the emerald-hosting rocks in Swat, NW Pakistan. Journal of Himalayan Earth Sciences, [S. l.], v. 29, n. 1, p. 81-89, 1996. Disponível em: http://ojs.uop.edu.pk/jhes/article/view/1488. Acesso em: 2 feb. 2025.