Vázquez Silva, E. and Monteiro Chissoca Chitungo, C. 2010. On the stability of certain perturbed systems of differential equations and the relationship with the magnitude of the perturbation. Revista de Matemática: Teoría y Aplicaciones. 17, 1 (Feb. 2010), 13–24. DOI:https://doi.org/10.15517/rmta.v17i1.309.