Heydari Monavvar, Hosein. “Validity and Functions of Custom in Iranian Contract Law and the UNIDROIT Principles of International Commercial Contracts: A Comparative Study”. Journal of Historical Research, Law and Policy (November 1, 2027): 1–21. Accessed October 22, 2026. https://www.jhrlp.com/index.php/jhrlp/article/view/445.