Panja, Prabir, and Dipak Kumar Jana. “A Novel Prey-Predator Quadratic Harvesting Model via Optimal Control Theory and Hopf Bifurcation”. Nepal Journal of Mathematical Sciences 1 (October 31, 2020): 1–22. Accessed May 5, 2024. https://www.nepjol.info/index.php/njmathsci/article/view/34155.