HUMBY, T. Maccsand: Intergovernmental relations and the doctrine of usurpation. Southern African Public Law, [S. l.], v. 27, n. 2, p. 628–638, 2012. Disponível em: https://unisapressjournals.co.za/index.php/SAPL/article/view/14762. Acesso em: 10 may. 2024.