Afful A-P, Yankson E. Exponential stability and instability in nonlinear differential equation with multiple delays . Proyecciones (Antofagasta, On line) [Internet]. 2023May10 [cited 2024Apr.24];42(3):681-93. Available from: https://www.revistaproyecciones.cl/index.php/proyecciones/article/view/4197