@article{carvalho_pinho_mischan_2010,  title={Methods to verify parameter equality in nonlinear regression models},  volume={67},  ISSN={0103-9016},  url={https://doi.org/10.1590/S0103-90162010000200014},  DOI={10.1590/S0103-90162010000200014},  number={2},  journal={Scientia Agricola},  publisher={Escola Superior de Agricultura "Luiz de Queiroz"},  author={Carvalho, Lídia Raquel de and Pinho, Sheila Zambello de and Mischan, Martha Maria},  year={2010},  month={Mar},  pages={218–222} }