T. L. Cabral Renovato Silva and S. A. Spellmann Cavalcanti de Farias, “The additional act of 1834 and the autonomy of the provinces: a historical and legal analysis about the 1824 constitutional reform under the influence of liberal constitutionalism of the nineteenth century”, Revista Jurídica Portucalense, no. 18, pp. 102–124, Feb. 2016.