Reduction theorems for the problem of stability of critical equilibria of impulsive differential equations. Neliniini Kolyvannya, [S. l.], v. 16, n. 4, p. 475–495, 2013. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/714. Acesso em: 21 jan. 2026.