Li Zong-Cheng,  Fundamental Equation of Complete Factor Synergetics of Complex Systems with Normalization of Dimension.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2010, vol. 39(3). 521 - 528
    [viewed 20 October 2019]. Available from: https://publications.waset.org/pdf/14216.