WASET
    D. I. De Souza and  G. P. Azevedo and  R. Rocha,  The Urban Transportation Systems in Two Cities Located in the Rio de Janeiro State, Brazil.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2012, vol. 69(9). 2448 - 2452
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/11996.