WASET
    S. Raja Balachandar and  K.Kannan,  A Meta-Heuristic Algorithm for Vertex Covering Problem Based on Gravity.   journal   = {International Journal of Physical and Mathematical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    November 2009, vol. 35(11). 1040 - 1046
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/11249.