@article{silva_romanelli_reichardt_2010,  title={Energy flow in castor bean (Ricinus communis L.) production systems},  volume={67},  ISSN={0103-9016},  url={https://doi.org/10.1590/S0103-90162010000600018},  DOI={10.1590/S0103-90162010000600018},  number={6},  journal={Scientia Agricola},  publisher={Escola Superior de Agricultura "Luiz de Queiroz"},  author={Silva, Adilson Nunes da and Romanelli, Thiago Libório and Reichardt, Klaus},  year={2010},  month={Dec},  pages={737–742} }