SIMEONOV , P. S.; BAINOV, D. D. APPLICATION OF THE METHOD OF THE TWO-SIDED APPROXIMATIONS TO THE SOLUTION OF THE PERIODIC PROBLEM FOR IMPULSIVE DIFFERENTIAL EQUATIONS. Tamkang Journal of Mathematics, [S. l.], v. 22, n. 3, p. 275–284, 1991. DOI: 10.5556/j.tkjm.22.1991.4612. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4612. Acesso em: 6 may. 2024.