HUMBY, Tracy. Maccsand: Intergovernmental relations and the doctrine of usurpation. Southern African Public Law, [S. l.], v. 27, n. 2, p. 628–638, 2023. Disponível em: https://www.unisapressjournals.co.za/index.php/SAPL/article/view/14762. Acesso em: 7 nov. 2025.