V. Thamizh Arasan and  G. Dhivya,  Measuring Heterogeneous Traffic Density.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2008, vol. 22(10). 236 - 240
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/8440.