WASET
    Y. Wang,  An Improved Method to Compute Sparse Graphs for Traveling Salesman Problem.   journal   = {International Journal of Industrial and Manufacturing Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2018, vol. 135(3). 198 - 206
    [viewed 29 March 2024]. Available from: https://publications.waset.org/pdf/10008525.