LI, N. On the existence of solutions of a Fermat-type difference equation. Annales Fennici Mathematici, [S. l.], v. 40, n. 2, p. 907–921, 2015. DOI: 10.5186/aasfm.2015.4051. Disponível em: https://afm.journal.fi/article/view/135578. Acesso em: 22 nov. 2024.