GEORGIEVA, A.; KOSTADINOV, S. APPROXIMATION METHODS FOR THE SOLUTIONS OF IMPULSE DIFFERENTIAL EQUATIONS. Tamkang Journal of Mathematics, [S. l.], v. 30, n. 4, p. 263–269, 1999. DOI: 10.5556/j.tkjm.30.1999.4232. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4232. Acesso em: 7 may. 2024.