@article{savu_ponce_joanni_bueno_castro_cilense_varela_longo_2009,  title={Grain size effect on the electrical response of SnO2 thin and thick film gas sensors},  volume={12},  ISSN={1516-1439},  url={https://doi.org/10.1590/S1516-14392009000100010},  DOI={10.1590/S1516-14392009000100010},  number={1},  journal={Materials Research},  publisher={ABM, ABC, ABPol},  author={Savu, Raluca and Ponce, Miguel Adolfo and Joanni, Ednan and Bueno, Paulo Roberto and Castro, Miriam and Cilense, Mario and Varela, José Arana and Longo, Elson},  year={2009},  month={Jan},  pages={83–87} }