Almasari SR. Proportionality Test in International Investment Agreements: Balancing Regulatory Sovereignty and Investor Protection. Nusantara: Journal Law and Islamic Law [Internet]. 2026 May 31 [cited 2026 Jun. 3];1(3):77-95. Available from: https://jurnal.smartpedia.co.id/index.php/nusantara/article/view/385