MEL'NIK, V. S. Topological methods in the theory of operator inclusions in Banach spaces. I. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 58, n. 2, p. 184–194, 2006. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3446. Acesso em: 6 dec. 2025.