Bounded solutions of weakly nonlinear differential equations in a Banach space. Neliniini Kolyvannya, [S. l.], v. 11, n. 2, p. 151–159, 2008. Disponível em: https://nosc.imath.kiev.ua/index.php/nosc/article/view/469. Acesso em: 12 apr. 2026.