EGEL, N. Roger Bacon, Letter to Pope Clement IV. Revista Española de Filosofía Medieval, [S. l.], v. 27, n. 2, p. 143–174, 2020. DOI: 10.21071/refime.v27i2.12915. Disponível em: https://journals.uco.es/refime/article/view/12915. Acesso em: 12 feb. 2025.