LYSIK, G. A characterization of real analytic functions. Annales Fennici Mathematici, [S. l.], v. 43, n. 1, p. 475–482, 2018. DOI: 10.5186/aasfm.2018.4325. Disponível em: https://afm.journal.fi/article/view/135738. Acesso em: 22 nov. 2024.