Fujian Wang and  Shubin Ruan and  Meiwei Dai,  Characteristics of Speed Dispersion in Urban Expressway.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2016, vol. 111(3). 288 - 292
    [viewed 21 October 2019]. Available from: https://publications.waset.org/pdf/10003857.