Handayani I. Concept and Position of Peremptory Norms (Jus Cogens) in International Law: A Preliminary Study. Hasanuddin Law Rev. [Internet]. 2019 Aug. 23 [cited 2025 Jul. 31];5(2):235-52. Available from: http://pasca.unhas.ac.id/ojs/index.php/halrev/article/view/1709