BILENKO, V. I.; BOZHONOK, K. V.; DZYADYK, S. Yu. Piecewise-polynomial approximations for the solutions of impulsive differential equations. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 71, n. 2, p. 168–179, 2019. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1429. Acesso em: 5 dec. 2025.