Al Quthami، K. M.، و Wainwright، M. (2012). Antibacterial Effect of Selenium, Germanium, and Lithium on Clinically Important Bacteria Growing in Planktonic Culture and Biofilms – some Medical Implications (رسالة دكتوراه غير منشورة). University of Sheffield، شفيلد. مسترجع من http://search.mandumah.com/Record/600788
Al Quthami، Khalid Marzouq، و Milton Wainwright. "Antibacterial Effect of Selenium, Germanium, and Lithium On Clinically Important Bacteria Growing in Planktonic Culture and Biofilms – Some Medical Implications" رسالة دكتوراه. University of Sheffield، شفيلد، 2012. مسترجع من http://search.mandumah.com/Record/600788