Existence and uniqueness of an analytic solution of a nonlinear differential-functional equation of neutral type. Neliniini Kolyvannya, [S. l.], v. 2, n. 2, p. 225–230, 1999. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/57. Acesso em: 22 jan. 2026.