@article{viana_são josé_matsumoto_sales-júnior_2002,  title={Estimation of optimum plot sizes in field experiments with annatto},  volume={61},  ISSN={0006-8705},  url={https://doi.org/10.1590/S0006-87052002000200011},  DOI={10.1590/S0006-87052002000200011},  number={2},  journal={Bragantia},  publisher={Instituto Agronômico de Campinas},  author={Viana, Anselmo Eloy Silveira and São José, Abel Rebouças and Matsumoto, Sylvana Naomi and Sales-Júnior, Sálvio Gusmão},  year={2002},  month={May},  pages={181–185} }