1. Aamir UB, Wernery U, Ilyushina N, Webster RG. Characterization of avian H9N2 influenza viruses from United Arab Emirates 2000 to 2003. Virology. 2007;361:45–55.
2. Alexander DJ. Avian Influenza - Diagnosis. Zoonoses Public Health. 2008;55:16–23.
3. Allawe AB. Study of effect of immunosuppresion caused by H9N2 in broiler. Iraqi J Vet Sci. 2008;32:80–9.
4. Aslam R, Aslam A, Tipu Y, Nazir J, Ghafoor A, Fatima S. Histopathological and immunohistochemical studies for the pathogenesis of a low pathogenicity H9 avian influenza virus in experimentally infected commercial broilers. J An Plant Sci. 2015;25:45–52.
5. Bancroft JD, Layton C. The hematoxylin and eosin. In: Suvarna SK, Layton C, Bancroft JD, editors. Theory practice of histological techniques. 7th ed. Philadelphia: Churchill Livingstone of El Sevier; 2013.