MOKROUSOV, Yu. G. On the Denseness of Subspaces of Analytic Vectors of a Closed Linear Operator in a Banach Space. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 52, n. 7, p. 985–989, 2000. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4499. Acesso em: 14 apr. 2025.