Sharif University of Technology Sharif Journal of Civil Engineering 2676-4768 Vol. 10 No . 7 1994 03 21 Motor vehicles and clean air Motor vehicles and clean air 37 41 455 FA T. Ebtekar Tehran University Journal Article 2011 07 05 - - https://sjce.journals.sharif.edu/article_455_4e5b8cfe91f71d2fb20a5877ce5cee62.pdf