SAMOILENKO, A. M. Some results of the local theory of smooth functions. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 59, n. 2, p. 231–267, 2007. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3306. Acesso em: 6 dec. 2025.