GONZÁLEZ, A. O., A. G. DA SILVA JR., R. M. SÁNCHEZ-ROMÁN, E. SILVA, and J. L. BRAGA. “ BRAZIL: A SYSTEM DYNAMICS APPROACH”. Brazilian Journal of Biosystems Engineering, vol. 2, no. 3, Dec. 2008, pp. 231-4, doi:10.18011/bioeng2008v2n3p231-241.