Issing, O. I.. Political Union? Some Critical Reflections. REVISTA PROCESOS DE MERCADO, [S. l.], v. 10, n. 1, p. 243–247, 2013. DOI: 10.52195/pm.v10i1.207. Disponível em: https://procesosdemercado.com/revista/2013/vol-10/num-1/political-union-some-critical-reflections. Acesso em: 1 abr. 2026.