Agarwal, M., & Pathak, R. (2013). Harvesting, Hopf Bifurcation and Chaos in Three Species Food Chain Model with Beddington–DeAngelis Type Functional Response. Journal of Global Research in Mathematical Archives(JGRMA), 1(1), 49–62. Retrieved from https://jgrma.com/index.php/jgrma/article/view/3