Fawz Abdul Salam K.AL-Saffar, Abdul Razak K. Mahmood, و Najwa I. AL- Barhawi, "Investigation at the molecular level for a nifgenes to bacteria klebsiella pneumoniea the use of polymerase chain reaction (PCR)", Tikrit J. Pure Sci., م 22, عدد 3, ص 58–62, 2023.