Investigation of periodic solutions of Cauchy problem for integro-differential equations with linear deviation of arguments. Neliniini Kolyvannya, [S. l.], v. 3, n. 2, p. 178–187, 2000. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/109. Acesso em: 22 jan. 2026.