Approximation of periodic solutions of linear differential-difference equations of neutral type by using the spline-collocation method. Neliniini Kolyvannya, [S. l.], v. 9, n. 2, p. 147–154, 2006. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/387. Acesso em: 21 jan. 2026.