@article{santos_novaes_bezerra_lemos_moreno_silva_santos_2010,  title={Application of simplex optimization in the development of an automated online preconcentration system for manganese determination},  volume={21},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532010001200022},  DOI={10.1590/S0103-50532010001200022},  number={12},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Santos, Queila O. dos and Novaes, Cléber G. and Bezerra, Marcos A. and Lemos, Valfredo A. and Moreno, Islania and Silva, Douglas G. da and Santos, Leandro dos},  year={2010},  month={Dec},  pages={2340–2346} }