HOEPFNER, G.; MEDRADO, R.; FERNANDO RAGOGNETTE, L. The Baouendi-Treves approximation theorem for Gevrey classes and applications. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE, [S. l.], v. 23, n. 1, p. 315-338, 2022. DOI: 10.2422/2036-2145.201912_008. Disponível em: http://20.103.181.36/index.php/annaliscienze/article/view/893. Acesso em: 27 may. 2025.