NIEDERKORN, M. ARS DICTAMINIS - RHETORICA BONA ET UTILIS. THEORY OF LETTERS, EXAMPLES OF SAMPLE LETTERS AND COLLECTIONS OF LETTERS. . Gerundium, [S. l.], v. 12, n. 1-2, p. 31–73, 2021. DOI: 10.29116/gerundium/2021/1-2/3. Disponível em: https://ojs.lib.unideb.hu/gerundium/article/view/9638. Acesso em: 25 oct. 2021.