Afful, Adusei-Poku, and Ernest Yankson. “Exponential Stability and Instability in Nonlinear Differential Equation With Multiple Delays ”. Proyecciones (Antofagasta, On line) 42, no. 3 (May 10, 2023): 681-693. Accessed April 18, 2024. https://www.revistaproyecciones.cl/index.php/proyecciones/article/view/4197.