@article{gallo_alvarez_abramides_1962,  title={Amostragem em cana-de-açúcar, para fins de analise foliar},  volume={21},  ISSN={0006-8705},  url={https://doi.org/10.1590/S0006-87051962000100054},  DOI={10.1590/S0006-87051962000100054},  number={unico},  journal={Bragantia},  publisher={Instituto Agronômico de Campinas},  author={Gallo, J. Romano and Alvarez, Raphael and Abramides, Eduardo},  year={1962},  pages={899–921} }