Huaying Wang, Haili Zhang, Yanxiu Sun, Yulei Pang
      Analysis of a Holling II system with frequency-dependent fitness and constant harvesting rate of prey
      Nonlinear Analysis and Differential Equations, Vol. 3, 2015, no. 4, 155-165
      http://dx.doi.org/10.12988/nade.2015.535

Copyright © 2015 Huaying Wang, Haili Zhang, Yanxiu Sun and Yulei Pang. This article is distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.