PAKOVICH, F. Functional equations in formal power series. Annales Fennici Mathematici, [S. l.], v. 49, n. 2, p. 601–620, 2024. DOI: 10.54330/afm.149373. Disponível em: https://afm.journal.fi/article/view/149373. Acesso em: 4 dec. 2024.