MARKIN, M. V. On scalar-type spectral operators and Carleman ultradifferentiable C0-semigroups. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 60, n. 9, p. 1215 – 1233, 2008. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3238. Acesso em: 11 apr. 2025.