A. M. A. El-Sayed, and M. E. Nasr. “Discontinuous Dynamical System Represents the Logistic Retarded Functional Equation With Two Different Delays”. Malaya Journal of Matematik 1, no. 01 (January 1, 2013): 50–56. Accessed November 5, 2024. https://www.malayajournal.org/index.php/mjm/article/view/339.