@article{vitória_rodrigues_2016,  title={Emergy efficiency analysis of sugarcane as a raw material for ethanol production},  volume={47},  ISSN={1806-6690},  url={https://doi.org/10.5935/1806-6690.20160074},  DOI={10.5935/1806-6690.20160074},  number={4},  journal={Revista Ciência Agronômica},  publisher={Universidade Federal do Ceará},  author={Vitória, Edney Leandro da and Rodrigues, Joice Paraguassú},  year={2016},  month={Oct},  pages={616–623} }