Basim Abdulmajid, Assist .Lect . Sura. “The Estoppel Principle in Public International Law”. Basra studies journal 2, no. 54 (September 15, 2024): 443–472. Accessed July 1, 2025. http://bsj.uobasrah.edu.iq/index.php/bsj/article/view/249.