Halwani، M. A.، Grundmann، H.، و Slack، R. (2004). A Prospective Cohort Study of Transmission of Nosocomial Pathogens in an Adult Intensive Care Unit: Risk Factors and Frequency of Occurrence (رسالة دكتوراه غير منشورة). University of Nottingham، نوتنغهام. مسترجع من http://search.mandumah.com/Record/600219
Halwani، Muhammad A.، Hajo Grundmann، و Richard Slack. "A Prospective Cohort Study of Transmission of Nosocomial Pathogens in an Adult Intensive Care Unit: Risk Factors and Frequency of Occurrence" رسالة دكتوراه. University of Nottingham، نوتنغهام، 2004. مسترجع من http://search.mandumah.com/Record/600219