Yongkun Li and Kaihong Zhao, 2n Positive Periodic Solutions to n Species Non-autonomous Lotka-Volterra Competition Systems with Harvesting Terms. journal = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology. June 2011, vol. 54(6). 824 - 827 [viewed 19 September 2024]. Available from: https://publications.waset.org/pdf/4365.