Saeed Sayyad Hagh Shomar,  Analysis and Evaluation of the Public Responses to Traffic Congestion Pricing Schemes in Urban Streets.   journal   = {International Journal of Transport and Vehicle Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2019, vol. 150(6). 890 - 894
    [viewed 18 November 2019]. Available from: https://publications.waset.org/pdf/10010505.