WASET
    Qianhong Zhang and  Wenzhuan Zhang,  On the System of Nonlinear Rational Difference Equations.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    April 2014, vol. 88(4). 702 - 705
    [viewed 04 May 2024]. Available from: https://publications.waset.org/pdf/9998174.