Periodic and asymptotically periodic solutions of a system of neutral type differential-difference equations. Neliniini Kolyvannya, [S. l.], v. 14, n. 1, p. 43–54, 2011. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/589. Acesso em: 21 jan. 2026.