some properties of the nonscillatory solutions of second order. Baghdad Science Journal, Iraq, Baghdad, v. 2, n. 4, p. 675–676, 2005. DOI: 10.21123/bsj.2005.666. Disponível em: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/666.. Acesso em: 3 jul. 2024.