@article{vafa-arani2014a,
  title = {A system dynamics modeling for urban air pollution: A case study of Tehran, Iran}
  author = {Vafa-Arani, Hamed; Jahani, Salman; Dashti, Hossein; Heydari, Jafar; Moazen, Saeed},
  journal = {Transportation Research Part D: Transport and Environment},
  url = {http://www.sciencedirect.com/science/article/pii/S1361920914000510},
  doi = {10.1016/j.trd.2014.05.016},
  year = {2014}
}