Rodrigues, W., Magalhães, K.A., Silveira, M.A. and Magalhães Filho, L.N. 2012. Economic, social and environmental analysis chain production of ethanol of sweet potato, in Tocantins state. Informe GEPEC. 15, 2 (Jan. 2012), 134–149. DOI:https://doi.org/10.48075/igepec.v15i2.5056.