NIEMENMAA, M.; ROSENBERGER, G. On the infinity of the Lonergan-Hosack presentation. Annales Fennici Mathematici, [S. l.], v. 14, n. 1, p. 129–131, 1989. DOI: 10.5186/aasfm.1989.1422. Disponível em: https://afm.journal.fi/article/view/134651. Acesso em: 25 nov. 2024.