Khaled S. Abdallah and  Abdel-Aziz M. Mohamed,  Modeling Sustainable Truck Rental Operations Using Closed-Loop Supply Chain Network.   journal   = {International Journal of Industrial and Manufacturing Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2017, vol. 126(6). 1200 - 1206
    [viewed 06 December 2019]. Available from: https://publications.waset.org/pdf/10007273.