@article{al-salem_khan_2008,  title={Comparative assessment of ambient air quality in two urban areas adjacent to petroleum downstream/upstream facilities in Kuwait},  volume={25},  ISSN={0104-6632},  url={https://doi.org/10.1590/S0104-66322008000400006},  DOI={10.1590/S0104-66322008000400006},  number={4},  journal={Brazilian Journal of Chemical Engineering},  publisher={Brazilian Society of Chemical Engineering},  author={Al-Salem, S. M. and Khan, A R.},  year={2008},  month={Oct},  pages={683–696} }