Sufficient conditions for oscillation of solutions of first order neutral delay impulsive differential equations with constant coefficients. Neliniini Kolyvannya, [S. l.], v. 13, n. 1, p. 15–29, 2010. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/547. Acesso em: 22 jan. 2026.