AQZZOUZ, B.; NOUIRA, R. Bartle and Graves theorem for approximatively surjective mappings with values in $b$-spaces. Methods of Functional Analysis and Topology, [S. l.], v. 11, n. 4, p. 320–326, 2005. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/290. Acesso em: 16 dec. 2025.