A.-R. S. Al-Ankari, M. Al-Ramadan, and M. El-Demerdash, “Risk Factors Associated with Prevalence of Swollen Head Syndrome (SHS) in Broiler Chickens in Eastern Province - Saudi Arabia”, Int. J. Poult. Sci., vol. 3, no. 10, pp. 646–650, Sep. 2004, doi: 10.3923/ijps.2004.646.650.