KOZACHENKO, Yu. V. Impulsive boundary-value problems for weakly nonlinear systems with control. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 51, n. 7, p. 910–917, 1999. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4680. Acesso em: 5 dec. 2025.