@article{vianna_reis_oliveira_fraga_sousa_2005,  title={Reduction of pollutants emissions on SI engines: accomplishments with efficiency increase},  volume={27},  ISSN={1678-5878},  url={https://doi.org/10.1590/S1678-58782005000300002},  DOI={10.1590/S1678-58782005000300002},  number={3},  journal={Journal of the Brazilian Society of Mechanical Sciences and Engineering},  publisher={Associação Brasileira de Engenharia e Ciências Mecânicas - ABCM},  author={Vianna, J. N. de S. and Reis, A. do V. and Oliveira, A. B. de S. and Fraga, A. G. and Sousa, M. T. de},  year={2005},  month={Jul},  pages={217–222} }