DEIGHTON, Jon. Extremism in European Football: Historical and Contemporary Review of Nine Countries. Journal of Innovation in Polytechnic Education, [S. l.], v. 7, n. 1, p. 121–133, 2025. DOI: 10.69520/jipe.v7i1.267. Disponível em: https://jipe.ca/index.php/jipe/article/view/267. Acesso em: 26 mar. 2026.