Ahmadi, Abouzar, Saeed Gohari, Amir Kondori, and Iman Zea Jaldi. “A Study of Legal Nature of Preliminary Agreements and Its Necessity Fundamentals”. International Journal of Asian Social Science 3, no. 4 (April 15, 2013): 1012–1019. Accessed May 7, 2024. https://archive.aessweb.com/index.php/5007/article/view/2472.