Wang Xu and  Yao Yangyang and  Lin Ying and  Wang Zhenzhen,  Operational Analysis of Urban Intelligent Transportation System and Strategies for Future Development - Taking Calling Service of Taxi in Wuhan as an Example.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2013, vol. 78(6). 1540 - 1546
    [viewed 27 May 2020]. Available from: https://publications.waset.org/pdf/15164.