Al Zahrani، A. S.، و Walde، T. (2007). Corporate Patent and the Agreement on Trade-Related Aspects of Intellectual Property Rights (Trips): The Enforcement Challenge (رسالة دكتوراه غير منشورة). University of Dundee، دندي. مسترجع من http://search.mandumah.com/Record/604183
Al Zahrani، Ali S.، و Thomas Walde. "Corporate Patent and the Agreement On Trade-Related Aspects of Intellectual Property Rights (Trips): The Enforcement Challenge" رسالة دكتوراه. University of Dundee، دندي، 2007. مسترجع من http://search.mandumah.com/Record/604183