@article{freitas_martins_solci_2012,  title={Size-segregated particulate matter and carboxylic acids over urban and rural sites in Londrina City, Brazil},  volume={23},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532012000500018},  DOI={10.1590/S0103-50532012000500018},  number={5},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Freitas, Adriana de M. and Martins, Leila D. and Solci, Maria Cristina},  year={2012},  month={May},  pages={921–930} }