WASET
    R. M. R. Hussein,  Towards Sustainable Urban Transportation Case Studies.   journal   = {International Journal of Transport and Vehicle Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2013, vol. 81(9). 2511 - 2519
    [viewed 29 March 2024]. Available from: https://publications.waset.org/pdf/16612.