Al Hamad، A. M.، و Upton، M. (2004). Regulation of Capsule Expression in Streptococcus Pneumoniae as an Important Factor in the Transmission from Carriage to Invasive State (رسالة ماجستير غير منشورة). University of Manchester، مانشستر. مسترجع من http://search.mandumah.com/Record/606346
Al Hamad، Arif M.، و Mathew Upton. "Regulation of Capsule Expression in Streptococcus Pneumoniae As an Important Factor in the Transmission From Carriage to Invasive State" رسالة ماجستير. University of Manchester، مانشستر، 2004. مسترجع من http://search.mandumah.com/Record/606346