Xiaoyan Dou and  Yongkun Li,  Almost Periodic Solution for a Food-limited Population Model with Delay and Feedback Control.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    August 2011, vol. 56(8). 1325 - 1330
    [viewed 15 October 2019]. Available from: https://publications.waset.org/pdf/833.