T. Matsubayashi and  T. Yamada,  A Force-directed Graph Drawing based on the Hierarchical Individual Timestep Method.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2007, vol. 3(3). 435 - 440
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/15171.