1. Brady, K.U., A.R. Kruckeberg, and H.D. Bradshaw Jr. 2005. Evolutionary ecology of plant adaptation to serpentine soils. Annual Review of Ecology, Evolution, and Systematics 36: 243–266.
2. Brazilian Mining Association (IBRAM). 2009. Information and analyses of the Brazilian Mining Economy. http://www.ibram.org (in Portuguese).
3. Brazilian Ministry of Mines and Energy (MME). 2010. National mining plan, 2030. Brasilia: MME (in Portuguese).
4. Brazilian Ministry of the Environment (MMA). 2009. Pillars for the financial sustainability of the national protected areas system. Brasilia: MMA (in Portuguese).
5. Brazilian Ministry of the Environment (MMA). 2010. National register of protected areas. http://www.ibama.gov.br/siucweb (in Portuguese).