WEST, Charles. «Fratres, omni die videtis cum vadit istud regnum in perdicionem»: Abbo of Saint-Germain and the Crisis of 888. Reti Medievali Rivista, [S. l.], v. 17, n. 2, p. 301–317, 2016. DOI: 10.6092/1593-2214/521. Disponível em: https://www.sharepress.it/index.php/rm/article/view/5007. Acesso em: 18 giu. 2025.