Chang, Xiaoyuan, and Junjie Wei. “Hopf Bifurcation and Optimal Control in a Diffusive Predator-Prey System With Time Delay and Prey Harvesting”. Nonlinear Analysis: Modelling and Control 17, no. 4 (October 25, 2012): 379–409. Accessed July 18, 2024. https://www.journals.vu.lt/nonlinear-analysis/article/view/14046.