San Nah Sze and  Wei King Tiong,  A Comparison between Heuristic and Meta-Heuristic Methods for Solving the Multiple Traveling Salesman Problem .   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    January 2007, vol. 1(1). 13 - 16
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/4699.