DHAGE, B. C. Approximation methods in the theory of hybrid differential equations with linear perturbations of second type. Tamkang Journal of Mathematics, [S. l.], v. 45, n. 1, p. 39–61, 2014. DOI: 10.5556/j.tkjm.45.2014.1328. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/1328. Acesso em: 16 apr. 2024.