Mining royalties: a global study of their impact on investors, government, snd civil society
OTTO, James; et al. Washington: The World Bank, 2006
Mining in Africa: Regulation and development
Bonnie Campbell (Ed.) New York: Pluto Press, 2009
Rochas e os minerais industriais como elemento de desenvolvimento sustentável, AS
Benjamim Perez. CETEM/MCT, 2001.