Asymptotic properties of solutions of a differential equation of order $n$ with almost constant coefficients and an impulsive effect. Neliniini Kolyvannya, [S. l.], v. 8, n. 4, p. 444–455, 2005. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/366. Acesso em: 22 jan. 2026.