@article{sangoi_ender_guidolin_almeida_heberle_2001,  title={Influence of row spacing reduction on maize grain yield in regions with a short summer},  volume={36},  ISSN={0100-204X},  url={https://doi.org/10.1590/S0100-204X2001000600003},  DOI={10.1590/S0100-204X2001000600003},  number={6},  journal={Pesquisa Agropecuária Brasileira},  publisher={Embrapa Secretaria de Pesquisa e Desenvolvimento; Pesquisa Agropecuária Brasileira},  author={Sangoi, Luís and Ender, Márcio and Guidolin, Altamir Frederico and Almeida, Milton Luiz de and Heberle, Pedro Canísio},  year={2001},  month={Jun},  pages={861–869} }