The Concept of Grundnorm in the Customary Law System: Reconciliation of Hans Kelsen’s Pure Legal Theory with Indonesian Legal Pluralism. JIHAD : Jurnal Ilmu Hukum dan Administrasi, [S. l.], v. 8, n. 1, 2026. DOI: 10.58258/jihad.v8i1.10333. Disponível em: https://ejournal.mandalanursa.org/index.php/JIHAD/article/view/10333. Acesso em: 22 jun. 2026.