G. M. Rehan and  H. S. Mahmoud,  The Integration between Transportation Solutions, Economic Development and Community Development as an Approach for Sustainability – A Case Study of Curitiba, Brazil.   journal   = {International Journal of Industrial and Systems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2011, vol. 49(1). 47 - 53
    [viewed 18 October 2021]. Available from: https://publications.waset.org/pdf/9333.