MEL'NIK, V. S. Topological methods in the theory of operator inclusions in Banach spaces. II. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 58, n. 4, p. 505–521, 2006. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3470. Acesso em: 11 apr. 2025.