GASSMANN, Jürg. The Bolognese Societates Armatae of the Late 13th Century. Acta Periodica Duellatorum, Bern, v. 2, n. 1, p. 195–233, 2015. DOI: 10.36950/apd-2014-007. Disponível em: https://bop.unibe.ch/apd/article/view/7000. Acesso em: 12 mar. 2025.