WASET
    Ziping Li and  Yongkun Li,  Almost Periodic Sequence Solutions of a Discrete Cooperation System with Feedback Controls.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    August 2011, vol. 56(8). 1331 - 1339
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/7340.