@article{1993,  volume={50},  ISSN={0103-9016},  url={https://doi.org/10.1590/S0103-90161993000300030},  DOI={10.1590/S0103-90161993000300030},  number={3},  journal={Scientia Agricola},  publisher={Escola Superior de Agricultura "Luiz de Queiroz"},  year={1993},  month={Oct},  pages={521–521} }