G. C. Amaral, T. M. Oliveira, R. T. Botrel, K. B. Souza, and M. S. Lopes, “Methodology for planning and interpretation of nature in the transition area cerrado-caatinga in Bom Jesus - PI: Trail of the Cedars”, Sci. Plena, vol. 8, no. 4(b), Jul. 2012.