MARKIN, M. V. On the Carleman ultradifferentiable vectors of a scalar type spectral operator. Methods of Functional Analysis and Topology, [S. l.], v. 21, n. 4, p. 361–369, 2015. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/623. Acesso em: 16 dec. 2025.