@article{perri_iemma_1999,  title={Procedimento "MIXED" do SAS® para análise de modelos mistos},  volume={56},  ISSN={0103-9016},  url={https://doi.org/10.1590/S0103-90161999000400025},  DOI={10.1590/S0103-90161999000400025},  number={4},  journal={Scientia Agricola},  publisher={Escola Superior de Agricultura "Luiz de Queiroz"},  author={Perri, Sílvia Helena Venturoli and Iemma, Antonio Francisco},  year={1999},  month={Oct},  pages={959–967} }