WAHLBERG, P. Semigroups for quadratic evolution equations acting on Shubin–Sobolev and Gelfand–Shilov spaces. Annales Fennici Mathematici, [S. l.], v. 47, n. 2, p. 821–853, 2022. DOI: 10.54330/afm.119820. Disponível em: https://afm.journal.fi/article/view/119820. Acesso em: 25 jun. 2022.