MATTEI-GENTILI, Piero. Proving customary norms: ontology and evidence in international law. Quaestio facti. Revista internacional sobre razonamiento probatorio, [S. l.], n. 11, 2026. DOI: 10.33115/udg_bib/qf.i11.23272. Disponível em: https://revistes.udg.edu/quaestio-facti/article/view/23272. Acesso em: 14 oct. 2026.