WANG, Tingxiu. Some General Theorems on Uniform Boundedness for Functional Differential Equations. CUBO, A Mathematical Journal, [S. l.], v. 11, n. 3, p. 25–40, 2009. Disponível em: https://cubo.ufro.cl/index.php/cubo/article/view/1460. Acesso em: 12 mar. 2026.