Siliang Wang and  Minghui Wang,  Optimal Route Policy in Air Traffic Control with Competing Airlines.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2010, vol. 39(3). 379 - 383
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/2667.