Dimitrios J. Dimitriou and  Maria F. Sartzetaki,  Social Dimension of Air Transport Sustainable Development.   journal   = {International Journal of Industrial and Systems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2018, vol. 136(4). 574 - 577
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/10009186.