CHRISTOPHER FREEMAN, B. Commune and the Papacy in the government of Perugia: 1488-1540. Annali della Fondazione italiana per la storia amministrativa, [S. l.], v. 4, p. 163–191, 1967. Disponível em: https://heyjoe.fbk.eu/index.php/anfisa/article/view/859. Acesso em: 3 lug. 2024.