@article{boock_nóbrega_freire_1962,  title={Experiências preliminares sôbre maneiras de aplicar adubos na cultura da batatinha},  volume={21},  ISSN={0006-8705},  url={https://doi.org/10.1590/S0006-87051962000100053},  DOI={10.1590/S0006-87051962000100053},  number={unico},  journal={Bragantia},  publisher={Instituto Agronômico de Campinas},  author={Boock, O. J. and Nóbrega, Sylvio de Azevedo and Freire, E. S.},  year={1962},  pages={887–897} }