@article{oliveira_nascente_kluthcouski_castro_2013,  title={Corn and soybean yields as affected by cover crops and herbicide timing under no-tillage system},  volume={31},  ISSN={0100-8358},  url={https://doi.org/10.1590/S0100-83582013000400020},  DOI={10.1590/S0100-83582013000400020},  number={4},  journal={Planta Daninha},  publisher={Sociedade Brasileira da Ciência das Plantas Daninhas },  author={Oliveira, P. and Nascente, A.S. and Kluthcouski, J. and Castro, T.A.P.},  year={2013},  month={Oct},  pages={939–946} }