King، D. A. (1979). On the early history of the universal astrolabe in islamic astonomy and the origin of the term Shakkaziya in medieval scientific arabic. مجلة تاريخ العلوم العربية، مج3, ع2 ، 244 - 255. مسترجع من http://search.mandumah.com/Record/648699
King، David A. "On the Early History of the Universal Astrolabe in Islamic Astonomy and the Origin of the Term Shakkaziya in Medieval Scientific Arabic." مجلة تاريخ العلوم العربية مج3, ع2 (1979): 244 - 255. مسترجع من http://search.mandumah.com/Record/648699