Harb, A. M., and M. A. Zohdy. “Chaos and Bifurcation Control Using Nonlinear Recursive Controller”. Nonlinear Analysis: Modelling and Control 7, no. 2 (December 5, 2002): 37–43. Accessed July 18, 2024. https://www.journals.vu.lt/nonlinear-analysis/article/view/15192.