Al Yahya، M. M.، و Watkinson، A. C. (1997). An Investigation Into the Level of Torque Applied by Manual and Electronic Torque Controllers and the Effect of the Screw Head Design on Loosening Torque (رسالة ماجستير غير منشورة). University of Bristol، بريستول. مسترجع من http://search.mandumah.com/Record/603397
Al Yahya، Musaad Mohammed، و Adrian C. Watkinson. "An Investigation Into the Level of Torque Applied By Manual and Electronic Torque Controllers and the Effect of the Screw Head Design On Loosening Torque" رسالة ماجستير. University of Bristol، بريستول، 1997. مسترجع من http://search.mandumah.com/Record/603397