WASET
    M. Orefice and  V. Di Vito ,  Aircraft Automatic Collision Avoidance Using Spiral Geometric Approach.   journal   = {International Journal of Computer and Systems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2016, vol. 112(4). 705 - 712
    [viewed 07 May 2024]. Available from: https://publications.waset.org/pdf/10004117.