Mohammed Al - Ruqeish, Y. M. Amin’, M. S., S. H. Chew, and C. S. Wong. 2008. “Relative Thermoluminescence Response of TLD-100, TLD-200 and GE-Doped Optical Fiber to 8.05 KeV X-Ray”. Malaysian Journal of Science 27 (2):91-95. http://ijie.um.edu.my/index.php/MJS/article/view/9214.