WASET
    Y. Wang,  The Frequency Graph for the Traveling Salesman Problem.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2012, vol. 70(10). 1189 - 1192
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/2862.