1. UNICA. Final report for 2012/2013 harvest: Centre-south region. Tech. Rep.; UNICA; 2014. URL http://www.unica.com.br/unicadata.
2. S. M. Default of payment of sugarcane plants reveals sugarenergy crisis in the state. O Progesso. URL http://www.progresso.com.br/dia-a-dia/calote-das-usinas-de-cana-revela-crise-sucroenergetica-no-estado.
3. Castrolanda. Unica provides closing more plants in the harvest 2015/16. Castrolanda cooperativa agroindustrial; 2015. p. 1–2. URL http://www.castrolanda.coop.br/noticia/corrrecao-unica-preve-fechamento-de-mais-usinas-na-safra-201516–16610.
4. NOVACANA. Mills authorized to produce ethanol by the national agency of petroleum, natural gas and biofuels. Tech. Rep.; NOVACANA; 2015. URL http://http://www.novacana.com/dados/usinas.
5. An algorithmic approach to network location problems. II: The p-medians;Kariv;J Appl Math,1979