WASET
    Byung-Ju Kim and  Jong-Jin Shin and  Hwa-Jin Nam and  Jin-Soo Kim,  Skyline Extraction using a Multistage Edge Filtering.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2011, vol. 55(7). 792 - 796
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/10437.